Finding the Fourth Proportional to 23,896.51, 32,978.02 and 13,142.20

Step by Step Solution

1. Step 1: Write the proportion equation
   23,896.51 : 32,978.02 = 13,142.20 : x
2. Step 2: Convert to fraction form
   23,896.51/32,978.02 = 13,142.20/x
3. Step 3: Cross multiply
   23,896.51x = 32,978.02 × 13,142.20
4. Step 4: Simplify right side
   23,896.51x = 433,403,569.55
5. Step 5: Solve for x
   x = 433,403,569.55/23,896.51
6. Step 6: Final answer
   x = 18,136.69