Finding the Fourth Proportional to 31,868.13, 43,978.91 and 17,721.93

Step by Step Solution

1. Step 1: Write the proportion equation
   31,868.13 : 43,978.91 = 17,721.93 : x
2. Step 2: Convert to fraction form
   31,868.13/43,978.91 = 17,721.93/x
3. Step 3: Cross multiply
   31,868.13x = 43,978.91 × 17,721.93
4. Step 4: Simplify right side
   31,868.13x = 779,391,164.50
5. Step 5: Solve for x
   x = 779,391,164.50/31,868.13
6. Step 6: Final answer
   x = 24,456.76