Finding the Fourth Proportional to 31,071.54, 42,879.80 and 17,642.36

Step by Step Solution

1. Step 1: Write the proportion equation
   31,071.54 : 42,879.80 = 17,642.36 : x
2. Step 2: Convert to fraction form
   31,071.54/42,879.80 = 17,642.36/x
3. Step 3: Cross multiply
   31,071.54x = 42,879.80 × 17,642.36
4. Step 4: Simplify right side
   31,071.54x = 756,500,868.33
5. Step 5: Solve for x
   x = 756,500,868.33/31,071.54
6. Step 6: Final answer
   x = 24,347.07