Finding the Fourth Proportional to 72,018,633.74, 108,024,139.56 and 20,206,844.42

Step by Step Solution

1. Step 1: Write the proportion equation
   72,018,633.74 : 108,024,139.56 = 20,206,844.42 : x
2. Step 2: Convert to fraction form
   72,018,633.74/108,024,139.56 = 20,206,844.42/x
3. Step 3: Cross multiply
   72,018,633.74x = 108,024,139.56 × 20,206,844.42
4. Step 4: Simplify right side
   72,018,633.74x = 2,182,826,981,693,287.50
5. Step 5: Solve for x
   x = 2,182,826,981,693,287.50/72,018,633.74
6. Step 6: Final answer
   x = 30,309,197.33