Finding the Fourth Proportional to 7,864.52, 10,839.69 and 5,207.31

Step by Step Solution

1. Step 1: Write the proportion equation
   7,864.52 : 10,839.69 = 5,207.31 : x
2. Step 2: Convert to fraction form
   7,864.52/10,839.69 = 5,207.31/x
3. Step 3: Cross multiply
   7,864.52x = 10,839.69 × 5,207.31
4. Step 4: Simplify right side
   7,864.52x = 56,445,626.13
5. Step 5: Solve for x
   x = 56,445,626.13/7,864.52
6. Step 6: Final answer
   x = 7,177.25