Finding the Fourth Proportional to 42,105.69, 63,149.90 and 15,809.85

Step by Step Solution

1. Step 1: Write the proportion equation
   42,105.69 : 63,149.90 = 15,809.85 : x
2. Step 2: Convert to fraction form
   42,105.69/63,149.90 = 15,809.85/x
3. Step 3: Cross multiply
   42,105.69x = 63,149.90 × 15,809.85
4. Step 4: Simplify right side
   42,105.69x = 998,390,367.47
5. Step 5: Solve for x
   x = 998,390,367.47/42,105.69
6. Step 6: Final answer
   x = 23,711.53