Finding the Fourth Proportional to 142,003,089,057.21, 195,970,422,890.61 and 78,638,315,745.21

Step by Step Solution

1. Step 1: Write the proportion equation
   142,003,089,057.21 : 195,970,422,890.61 = 78,638,315,745.21 : x
2. Step 2: Convert to fraction form
   142,003,089,057.21/195,970,422,890.61 = 78,638,315,745.21/x
3. Step 3: Cross multiply
   142,003,089,057.21x = 195,970,422,890.61 × 78,638,315,745.21
4. Step 4: Simplify right side
   142,003,089,057.21x = 15,410,783,991,994,119,094,272
5. Step 5: Solve for x
   x = 15,410,783,991,994,119,094,272/142,003,089,057.21
6. Step 6: Final answer
   x = 108,524,287,001.85