Finding the Fourth Proportional to 31,151.32, 42,987.78 and 17,724.04

Step by Step Solution

1. Step 1: Write the proportion equation
   31,151.32 : 42,987.78 = 17,724.04 : x
2. Step 2: Convert to fraction form
   31,151.32/42,987.78 = 17,724.04/x
3. Step 3: Cross multiply
   31,151.32x = 42,987.78 × 17,724.04
4. Step 4: Simplify right side
   31,151.32x = 761,917,132.23
5. Step 5: Solve for x
   x = 761,917,132.23/31,151.32
6. Step 6: Final answer
   x = 24,458.58