Finding the Fourth Proportional to 42,088.80, 63,130.72 and 15,791.32

Step by Step Solution

1. Step 1: Write the proportion equation
   42,088.80 : 63,130.72 = 15,791.32 : x
2. Step 2: Convert to fraction form
   42,088.80/63,130.72 = 15,791.32/x
3. Step 3: Cross multiply
   42,088.80x = 63,130.72 × 15,791.32
4. Step 4: Simplify right side
   42,088.80x = 996,917,401.35
5. Step 5: Solve for x
   x = 996,917,401.35/42,088.80
6. Step 6: Final answer
   x = 23,686.05