Finding the Fourth Proportional to 9,351.16, 12,909.27 and 5,815.51

Step by Step Solution

1. Step 1: Write the proportion equation
   9,351.16 : 12,909.27 = 5,815.51 : x
2. Step 2: Convert to fraction form
   9,351.16/12,909.27 = 5,815.51/x
3. Step 3: Cross multiply
   9,351.16x = 12,909.27 × 5,815.51
4. Step 4: Simplify right side
   9,351.16x = 75,073,978.31
5. Step 5: Solve for x
   x = 75,073,978.31/9,351.16
6. Step 6: Final answer
   x = 8,028.31