Finding the Fourth Proportional to 23,085.43, 31,860.43 and 13,397.02

Step by Step Solution

1. Step 1: Write the proportion equation
   23,085.43 : 31,860.43 = 13,397.02 : x
2. Step 2: Convert to fraction form
   23,085.43/31,860.43 = 13,397.02/x
3. Step 3: Cross multiply
   23,085.43x = 31,860.43 × 13,397.02
4. Step 4: Simplify right side
   23,085.43x = 426,834,817.92
5. Step 5: Solve for x
   x = 426,834,817.92/23,085.43
6. Step 6: Final answer
   x = 18,489.36