Finding the Fourth Proportional to 42,151.75, 63,231.27 and 10,987

Step by Step Solution

1. Step 1: Write the proportion equation
   42,151.75 : 63,231.27 = 10,987 : x
2. Step 2: Convert to fraction form
   42,151.75/63,231.27 = 10,987/x
3. Step 3: Cross multiply
   42,151.75x = 63,231.27 × 10,987
4. Step 4: Simplify right side
   42,151.75x = 694,721,963.49
5. Step 5: Solve for x
   x = 694,721,963.49/42,151.75
6. Step 6: Final answer
   x = 16,481.45