Finding the Fourth Proportional to 9,359.30, 12,915.83 and 5,167.55

Step by Step Solution

1. Step 1: Write the proportion equation
   9,359.30 : 12,915.83 = 5,167.55 : x
2. Step 2: Convert to fraction form
   9,359.30/12,915.83 = 5,167.55/x
3. Step 3: Cross multiply
   9,359.30x = 12,915.83 × 5,167.55
4. Step 4: Simplify right side
   9,359.30x = 66,743,155.34
5. Step 5: Solve for x
   x = 66,743,155.34/9,359.30
6. Step 6: Final answer
   x = 7,131.21