Finding the Fourth Proportional to 23,490.78, 32,417.90 and 13,422.47

Step by Step Solution

1. Step 1: Write the proportion equation
   23,490.78 : 32,417.90 = 13,422.47 : x
2. Step 2: Convert to fraction form
   23,490.78/32,417.90 = 13,422.47/x
3. Step 3: Cross multiply
   23,490.78x = 32,417.90 × 13,422.47
4. Step 4: Simplify right side
   23,490.78x = 435,128,061.01
5. Step 5: Solve for x
   x = 435,128,061.01/23,490.78
6. Step 6: Final answer
   x = 18,523.36