Finding the Fourth Proportional to 42,121, 63,142.62 and 15,807.88

Step by Step Solution

1. Step 1: Write the proportion equation
   42,121 : 63,142.62 = 15,807.88 : x
2. Step 2: Convert to fraction form
   42,121/63,142.62 = 15,807.88/x
3. Step 3: Cross multiply
   42,121x = 63,142.62 × 15,807.88
4. Step 4: Simplify right side
   42,121x = 998,150,959.85
5. Step 5: Solve for x
   x = 998,150,959.85/42,121
6. Step 6: Final answer
   x = 23,697.23