Finding the Fourth Proportional to 82,105,710.77, 112,702,332.74 and 72,605,120.33

Step by Step Solution

1. Step 1: Write the proportion equation
   82,105,710.77 : 112,702,332.74 = 72,605,120.33 : x
2. Step 2: Convert to fraction form
   82,105,710.77/112,702,332.74 = 72,605,120.33/x
3. Step 3: Cross multiply
   82,105,710.77x = 112,702,332.74 × 72,605,120.33
4. Step 4: Simplify right side
   82,105,710.77x = 8,182,766,429,978,128
5. Step 5: Solve for x
   x = 8,182,766,429,978,128/82,105,710.77
6. Step 6: Final answer
   x = 99,661,355.50