Finding the Fourth Proportional to 8,265.15, 12,409.47 and 5,158.26

Step by Step Solution

1. Step 1: Write the proportion equation
   8,265.15 : 12,409.47 = 5,158.26 : x
2. Step 2: Convert to fraction form
   8,265.15/12,409.47 = 5,158.26/x
3. Step 3: Cross multiply
   8,265.15x = 12,409.47 × 5,158.26
4. Step 4: Simplify right side
   8,265.15x = 64,011,272.72
5. Step 5: Solve for x
   x = 64,011,272.72/8,265.15
6. Step 6: Final answer
   x = 7,744.72