Finding the Fourth Proportional to 23,085, 31,857.30 and 13,150.92

Step by Step Solution

1. Step 1: Write the proportion equation
   23,085 : 31,857.30 = 13,150.92 : x
2. Step 2: Convert to fraction form
   23,085/31,857.30 = 13,150.92/x
3. Step 3: Cross multiply
   23,085x = 31,857.30 × 13,150.92
4. Step 4: Simplify right side
   23,085x = 418,952,803.72
5. Step 5: Solve for x
   x = 418,952,803.72/23,085
6. Step 6: Final answer
   x = 18,148.27