Finding the Fourth Proportional to 23,467.40, 32,385.12 and 12,857

Step by Step Solution

1. Step 1: Write the proportion equation
   23,467.40 : 32,385.12 = 12,857 : x
2. Step 2: Convert to fraction form
   23,467.40/32,385.12 = 12,857/x
3. Step 3: Cross multiply
   23,467.40x = 32,385.12 × 12,857
4. Step 4: Simplify right side
   23,467.40x = 416,375,487.84
5. Step 5: Solve for x
   x = 416,375,487.84/23,467.40
6. Step 6: Final answer
   x = 17,742.72