Finding the Fourth Proportional to 31,068.66, 42,875.83 and 17,639.47

Step by Step Solution

1. Step 1: Write the proportion equation
   31,068.66 : 42,875.83 = 17,639.47 : x
2. Step 2: Convert to fraction form
   31,068.66/42,875.83 = 17,639.47/x
3. Step 3: Cross multiply
   31,068.66x = 42,875.83 × 17,639.47
4. Step 4: Simplify right side
   31,068.66x = 756,306,917.01
5. Step 5: Solve for x
   x = 756,306,917.01/31,068.66
6. Step 6: Final answer
   x = 24,343.08