Finding the Fourth Proportional to 31,068.25, 42,876.60 and 17,643.71

Step by Step Solution

1. Step 1: Write the proportion equation
   31,068.25 : 42,876.60 = 17,643.71 : x
2. Step 2: Convert to fraction form
   31,068.25/42,876.60 = 17,643.71/x
3. Step 3: Cross multiply
   31,068.25x = 42,876.60 × 17,643.71
4. Step 4: Simplify right side
   31,068.25x = 756,502,296.19
5. Step 5: Solve for x
   x = 756,502,296.19/31,068.25
6. Step 6: Final answer
   x = 24,349.69