Finding the Fourth Proportional to 82,105,710.21, 112,702,331.98 and 72,605,119.77

Step by Step Solution

1. Step 1: Write the proportion equation
   82,105,710.21 : 112,702,331.98 = 72,605,119.77 : x
2. Step 2: Convert to fraction form
   82,105,710.21/112,702,331.98 = 72,605,119.77/x
3. Step 3: Cross multiply
   82,105,710.21x = 112,702,331.98 × 72,605,119.77
4. Step 4: Simplify right side
   82,105,710.21x = 8,182,766,311,856,957
5. Step 5: Solve for x
   x = 8,182,766,311,856,957/82,105,710.21
6. Step 6: Final answer
   x = 99,661,354.75