Finding the Fourth Proportional to 31,091.50, 42,908.09 and 17,663.32

Step by Step Solution

1. Step 1: Write the proportion equation
   31,091.50 : 42,908.09 = 17,663.32 : x
2. Step 2: Convert to fraction form
   31,091.50/42,908.09 = 17,663.32/x
3. Step 3: Cross multiply
   31,091.50x = 42,908.09 × 17,663.32
4. Step 4: Simplify right side
   31,091.50x = 757,899,324.26
5. Step 5: Solve for x
   x = 757,899,324.26/31,091.50
6. Step 6: Final answer
   x = 24,376.42