Finding the Fourth Proportional to 9,359.15, 12,915.86 and 5,379.48

Step by Step Solution

1. Step 1: Write the proportion equation
   9,359.15 : 12,915.86 = 5,379.48 : x
2. Step 2: Convert to fraction form
   9,359.15/12,915.86 = 5,379.48/x
3. Step 3: Cross multiply
   9,359.15x = 12,915.86 × 5,379.48
4. Step 4: Simplify right side
   9,359.15x = 69,480,583.66
5. Step 5: Solve for x
   x = 69,480,583.66/9,359.15
6. Step 6: Final answer
   x = 7,423.82