Finding the Fourth Proportional to 142,029,649.31, 212,856,132.24 and 72,939,662.10

Step by Step Solution

1. Step 1: Write the proportion equation
   142,029,649.31 : 212,856,132.24 = 72,939,662.10 : x
2. Step 2: Convert to fraction form
   142,029,649.31/212,856,132.24 = 72,939,662.10/x
3. Step 3: Cross multiply
   142,029,649.31x = 212,856,132.24 × 72,939,662.10
4. Step 4: Simplify right side
   142,029,649.31x = 15,525,654,361,498,516
5. Step 5: Solve for x
   x = 15,525,654,361,498,516/142,029,649.31
6. Step 6: Final answer
   x = 109,312,769.82