Finding the Fourth Proportional to 73,212, 100,998.72 and 42,987.60

Step by Step Solution

1. Step 1: Write the proportion equation
   73,212 : 100,998.72 = 42,987.60 : x
2. Step 2: Convert to fraction form
   73,212/100,998.72 = 42,987.60/x
3. Step 3: Cross multiply
   73,212x = 100,998.72 × 42,987.60
4. Step 4: Simplify right side
   73,212x = 4,341,692,575.87
5. Step 5: Solve for x
   x = 4,341,692,575.87/73,212
6. Step 6: Final answer
   x = 59,303.02