Finding the Fourth Proportional to 31,068.54, 42,875.66 and 17,639.35

Step by Step Solution

1. Step 1: Write the proportion equation
   31,068.54 : 42,875.66 = 17,639.35 : x
2. Step 2: Convert to fraction form
   31,068.54/42,875.66 = 17,639.35/x
3. Step 3: Cross multiply
   31,068.54x = 42,875.66 × 17,639.35
4. Step 4: Simplify right side
   31,068.54x = 756,298,773.22
5. Step 5: Solve for x
   x = 756,298,773.22/31,068.54
6. Step 6: Final answer
   x = 24,342.91