Finding the Fourth Proportional to 23,172.48, 31,978.17 and 12,562.20

Step by Step Solution

1. Step 1: Write the proportion equation
   23,172.48 : 31,978.17 = 12,562.20 : x
2. Step 2: Convert to fraction form
   23,172.48/31,978.17 = 12,562.20/x
3. Step 3: Cross multiply
   23,172.48x = 31,978.17 × 12,562.20
4. Step 4: Simplify right side
   23,172.48x = 401,716,167.17
5. Step 5: Solve for x
   x = 401,716,167.17/23,172.48
6. Step 6: Final answer
   x = 17,335.92