Finding the Fourth Proportional to 12,158.53, 16,762.52 and 9,120.74

Step by Step Solution

1. Step 1: Write the proportion equation
   12,158.53 : 16,762.52 = 9,120.74 : x
2. Step 2: Convert to fraction form
   12,158.53/16,762.52 = 9,120.74/x
3. Step 3: Cross multiply
   12,158.53x = 16,762.52 × 9,120.74
4. Step 4: Simplify right side
   12,158.53x = 152,886,502.85
5. Step 5: Solve for x
   x = 152,886,502.85/12,158.53
6. Step 6: Final answer
   x = 12,574.42