Finding the Fourth Proportional to 147,915,086.23, 221,440,905.82 and 86,315,480.47

Step by Step Solution

1. Step 1: Write the proportion equation
   147,915,086.23 : 221,440,905.82 = 86,315,480.47 : x
2. Step 2: Convert to fraction form
   147,915,086.23/221,440,905.82 = 86,315,480.47/x
3. Step 3: Cross multiply
   147,915,086.23x = 221,440,905.82 × 86,315,480.47
4. Step 4: Simplify right side
   147,915,086.23x = 19,113,778,181,565,320
5. Step 5: Solve for x
   x = 19,113,778,181,565,320/147,915,086.23
6. Step 6: Final answer
   x = 129,221,289.52