Finding the Fourth Proportional to 82,428,449.88, 123,646,037.31 and 21,019,201.20

Step by Step Solution

1. Step 1: Write the proportion equation
   82,428,449.88 : 123,646,037.31 = 21,019,201.20 : x
2. Step 2: Convert to fraction form
   82,428,449.88/123,646,037.31 = 21,019,201.20/x
3. Step 3: Cross multiply
   82,428,449.88x = 123,646,037.31 × 21,019,201.20
4. Step 4: Simplify right side
   82,428,449.88x = 2,598,940,935,801,596.50
5. Step 5: Solve for x
   x = 2,598,940,935,801,596.50/82,428,449.88
6. Step 6: Final answer
   x = 31,529,659.23