Finding the Fourth Proportional to 23,419.20, 32,317.12 and 12,806.72

Step by Step Solution

1. Step 1: Write the proportion equation
   23,419.20 : 32,317.12 = 12,806.72 : x
2. Step 2: Convert to fraction form
   23,419.20/32,317.12 = 12,806.72/x
3. Step 3: Cross multiply
   23,419.20x = 32,317.12 × 12,806.72
4. Step 4: Simplify right side
   23,419.20x = 413,876,307.05
5. Step 5: Solve for x
   x = 413,876,307.05/23,419.20
6. Step 6: Final answer
   x = 17,672.52