Finding the Fourth Proportional to 42,118.15, 63,147.96 and 15,815.83

Step by Step Solution

1. Step 1: Write the proportion equation
   42,118.15 : 63,147.96 = 15,815.83 : x
2. Step 2: Convert to fraction form
   42,118.15/63,147.96 = 15,815.83/x
3. Step 3: Cross multiply
   42,118.15x = 63,147.96 × 15,815.83
4. Step 4: Simplify right side
   42,118.15x = 998,737,400.21
5. Step 5: Solve for x
   x = 998,737,400.21/42,118.15
6. Step 6: Final answer
   x = 23,712.76