Finding the Fourth Proportional to 23,142.42, 31,936.59 and 12,531.99

Step by Step Solution

1. Step 1: Write the proportion equation
   23,142.42 : 31,936.59 = 12,531.99 : x
2. Step 2: Convert to fraction form
   23,142.42/31,936.59 = 12,531.99/x
3. Step 3: Cross multiply
   23,142.42x = 31,936.59 × 12,531.99
4. Step 4: Simplify right side
   23,142.42x = 400,229,026.51
5. Step 5: Solve for x
   x = 400,229,026.51/23,142.42
6. Step 6: Final answer
   x = 17,294.17