Finding the Fourth Proportional to 23,897, 32,978.70 and 13,142.68

Step by Step Solution

1. Step 1: Write the proportion equation
   23,897 : 32,978.70 = 13,142.68 : x
2. Step 2: Convert to fraction form
   23,897/32,978.70 = 13,142.68/x
3. Step 3: Cross multiply
   23,897x = 32,978.70 × 13,142.68
4. Step 4: Simplify right side
   23,897x = 433,428,500.92
5. Step 5: Solve for x
   x = 433,428,500.92/23,897
6. Step 6: Final answer
   x = 18,137.36