Finding the Fourth Proportional to 142,436,392.16, 196,557,998.18 and 78,859,563.86

Step by Step Solution

1. Step 1: Write the proportion equation
   142,436,392.16 : 196,557,998.18 = 78,859,563.86 : x
2. Step 2: Convert to fraction form
   142,436,392.16/196,557,998.18 = 78,859,563.86/x
3. Step 3: Cross multiply
   142,436,392.16x = 196,557,998.18 × 78,859,563.86
4. Step 4: Simplify right side
   142,436,392.16x = 15,500,478,009,766,572
5. Step 5: Solve for x
   x = 15,500,478,009,766,572/142,436,392.16
6. Step 6: Final answer
   x = 108,823,860.08