Finding the Fourth Proportional to 23,100.24, 31,878.32 and 12,489.88

Step by Step Solution

1. Step 1: Write the proportion equation
   23,100.24 : 31,878.32 = 12,489.88 : x
2. Step 2: Convert to fraction form
   23,100.24/31,878.32 = 12,489.88/x
3. Step 3: Cross multiply
   23,100.24x = 31,878.32 × 12,489.88
4. Step 4: Simplify right side
   23,100.24x = 398,156,391.40
5. Step 5: Solve for x
   x = 398,156,391.40/23,100.24
6. Step 6: Final answer
   x = 17,236.03