Finding the Fourth Proportional to 9,317.15, 12,857.56 and 5,125.39

Step by Step Solution

1. Step 1: Write the proportion equation
   9,317.15 : 12,857.56 = 5,125.39 : x
2. Step 2: Convert to fraction form
   9,317.15/12,857.56 = 5,125.39/x
3. Step 3: Cross multiply
   9,317.15x = 12,857.56 × 5,125.39
4. Step 4: Simplify right side
   9,317.15x = 65,899,983.82
5. Step 5: Solve for x
   x = 65,899,983.82/9,317.15
6. Step 6: Final answer
   x = 7,072.98