Finding the Fourth Proportional to 72,391.47, 108,590.25 and 19,800.87

Step by Step Solution

1. Step 1: Write the proportion equation
   72,391.47 : 108,590.25 = 19,800.87 : x
2. Step 2: Convert to fraction form
   72,391.47/108,590.25 = 19,800.87/x
3. Step 3: Cross multiply
   72,391.47x = 108,590.25 × 19,800.87
4. Step 4: Simplify right side
   72,391.47x = 2,150,181,423.52
5. Step 5: Solve for x
   x = 2,150,181,423.52/72,391.47
6. Step 6: Final answer
   x = 29,702.14