Finding the Fourth Proportional to 124,331,085.72, 171,593,382.15 and 72,109,331.10

Step by Step Solution

1. Step 1: Write the proportion equation
   124,331,085.72 : 171,593,382.15 = 72,109,331.10 : x
2. Step 2: Convert to fraction form
   124,331,085.72/171,593,382.15 = 72,109,331.10/x
3. Step 3: Cross multiply
   124,331,085.72x = 171,593,382.15 × 72,109,331.10
4. Step 4: Simplify right side
   124,331,085.72x = 12,373,484,008,023,180
5. Step 5: Solve for x
   x = 12,373,484,008,023,180/124,331,085.72
6. Step 6: Final answer
   x = 99,520,437.20