Finding the Fourth Proportional to 9,156.28, 12,635.58 and 5,379.52

Step by Step Solution

1. Step 1: Write the proportion equation
   9,156.28 : 12,635.58 = 5,379.52 : x
2. Step 2: Convert to fraction form
   9,156.28/12,635.58 = 5,379.52/x
3. Step 3: Cross multiply
   9,156.28x = 12,635.58 × 5,379.52
4. Step 4: Simplify right side
   9,156.28x = 67,973,355.32
5. Step 5: Solve for x
   x = 67,973,355.32/9,156.28
6. Step 6: Final answer
   x = 7,423.69