Finding the Fourth Proportional to 31,386.86, 43,314.61 and 17,240.00

Step by Step Solution

1. Step 1: Write the proportion equation
   31,386.86 : 43,314.61 = 17,240.00 : x
2. Step 2: Convert to fraction form
   31,386.86/43,314.61 = 17,240.00/x
3. Step 3: Cross multiply
   31,386.86x = 43,314.61 × 17,240.00
4. Step 4: Simplify right side
   31,386.86x = 746,743,616.73
5. Step 5: Solve for x
   x = 746,743,616.73/31,386.86
6. Step 6: Final answer
   x = 23,791.60