Finding the Fourth Proportional to 139,442,212.62, 209,188,856.70 and 57,516,399.36

Step by Step Solution

1. Step 1: Write the proportion equation
   139,442,212.62 : 209,188,856.70 = 57,516,399.36 : x
2. Step 2: Convert to fraction form
   139,442,212.62/209,188,856.70 = 57,516,399.36/x
3. Step 3: Cross multiply
   139,442,212.62x = 209,188,856.70 × 57,516,399.36
4. Step 4: Simplify right side
   139,442,212.62x = 12,031,789,823,619,010
5. Step 5: Solve for x
   x = 12,031,789,823,619,010/139,442,212.62
6. Step 6: Final answer
   x = 86,285,132.73