Finding the Fourth Proportional to 9,360.31, 12,917.22 and 5,382.20

Step by Step Solution

1. Step 1: Write the proportion equation
   9,360.31 : 12,917.22 = 5,382.20 : x
2. Step 2: Convert to fraction form
   9,360.31/12,917.22 = 5,382.20/x
3. Step 3: Cross multiply
   9,360.31x = 12,917.22 × 5,382.20
4. Step 4: Simplify right side
   9,360.31x = 69,523,061.48
5. Step 5: Solve for x
   x = 69,523,061.48/9,360.31
6. Step 6: Final answer
   x = 7,427.43