Finding the Fourth Proportional to 9,354.56, 12,909.04 and 5,162.72

Step by Step Solution

1. Step 1: Write the proportion equation
   9,354.56 : 12,909.04 = 5,162.72 : x
2. Step 2: Convert to fraction form
   9,354.56/12,909.04 = 5,162.72/x
3. Step 3: Cross multiply
   9,354.56x = 12,909.04 × 5,162.72
4. Step 4: Simplify right side
   9,354.56x = 66,645,758.99
5. Step 5: Solve for x
   x = 66,645,758.99/9,354.56
6. Step 6: Final answer
   x = 7,124.41