Finding the Fourth Proportional to 31,111.83, 42,932.78 and 17,681.31

Step by Step Solution

1. Step 1: Write the proportion equation
   31,111.83 : 42,932.78 = 17,681.31 : x
2. Step 2: Convert to fraction form
   31,111.83/42,932.78 = 17,681.31/x
3. Step 3: Cross multiply
   31,111.83x = 42,932.78 × 17,681.31
4. Step 4: Simplify right side
   31,111.83x = 759,107,703.94
5. Step 5: Solve for x
   x = 759,107,703.94/31,111.83
6. Step 6: Final answer
   x = 24,399.33