Finding the Fourth Proportional to 23,090.52, 31,864.91 and 12,480.15

Step by Step Solution

1. Step 1: Write the proportion equation
   23,090.52 : 31,864.91 = 12,480.15 : x
2. Step 2: Convert to fraction form
   23,090.52/31,864.91 = 12,480.15/x
3. Step 3: Cross multiply
   23,090.52x = 31,864.91 × 12,480.15
4. Step 4: Simplify right side
   23,090.52x = 397,678,948.26
5. Step 5: Solve for x
   x = 397,678,948.26/23,090.52
6. Step 6: Final answer
   x = 17,222.61