Finding the Fourth Proportional to 9,359.08, 12,915.42 and 5,379.89

Step by Step Solution

1. Step 1: Write the proportion equation
   9,359.08 : 12,915.42 = 5,379.89 : x
2. Step 2: Convert to fraction form
   9,359.08/12,915.42 = 5,379.89/x
3. Step 3: Cross multiply
   9,359.08x = 12,915.42 × 5,379.89
4. Step 4: Simplify right side
   9,359.08x = 69,483,454.15
5. Step 5: Solve for x
   x = 69,483,454.15/9,359.08
6. Step 6: Final answer
   x = 7,424.18