Finding the Fourth Proportional to 12,540.08, 17,291.88 and 7,823.12

Step by Step Solution

1. Step 1: Write the proportion equation
   12,540.08 : 17,291.88 = 7,823.12 : x
2. Step 2: Convert to fraction form
   12,540.08/17,291.88 = 7,823.12/x
3. Step 3: Cross multiply
   12,540.08x = 17,291.88 × 7,823.12
4. Step 4: Simplify right side
   12,540.08x = 135,276,452.27
5. Step 5: Solve for x
   x = 135,276,452.27/12,540.08
6. Step 6: Final answer
   x = 10,787.53