Finding the Fourth Proportional to 72,403.91, 108,601.89 and 19,809.59

Step by Step Solution

1. Step 1: Write the proportion equation
   72,403.91 : 108,601.89 = 19,809.59 : x
2. Step 2: Convert to fraction form
   72,403.91/108,601.89 = 19,809.59/x
3. Step 3: Cross multiply
   72,403.91x = 108,601.89 × 19,809.59
4. Step 4: Simplify right side
   72,403.91x = 2,151,358,371.12
5. Step 5: Solve for x
   x = 2,151,358,371.12/72,403.91
6. Step 6: Final answer
   x = 29,713.29