Finding the Fourth Proportional to 31,039.78, 42,759.63 and 23,068.18

Step by Step Solution

1. Step 1: Write the proportion equation
   31,039.78 : 42,759.63 = 23,068.18 : x
2. Step 2: Convert to fraction form
   31,039.78/42,759.63 = 23,068.18/x
3. Step 3: Cross multiply
   31,039.78x = 42,759.63 × 23,068.18
4. Step 4: Simplify right side
   31,039.78x = 986,386,841.57
5. Step 5: Solve for x
   x = 986,386,841.57/31,039.78
6. Step 6: Final answer
   x = 31,778.15