Finding the Fourth Proportional to 12,120.53, 16,726.50 and 9,090.32

Step by Step Solution

1. Step 1: Write the proportion equation
   12,120.53 : 16,726.50 = 9,090.32 : x
2. Step 2: Convert to fraction form
   12,120.53/16,726.50 = 9,090.32/x
3. Step 3: Cross multiply
   12,120.53x = 16,726.50 × 9,090.32
4. Step 4: Simplify right side
   12,120.53x = 152,049,153.85
5. Step 5: Solve for x
   x = 152,049,153.85/12,120.53
6. Step 6: Final answer
   x = 12,544.77