Finding the Fourth Proportional to 8,354.72, 12,531.72 and 3,422.72

Step by Step Solution

1. Step 1: Write the proportion equation
   8,354.72 : 12,531.72 = 3,422.72 : x
2. Step 2: Convert to fraction form
   8,354.72/12,531.72 = 3,422.72/x
3. Step 3: Cross multiply
   8,354.72x = 12,531.72 × 3,422.72
4. Step 4: Simplify right side
   8,354.72x = 42,892,568.68
5. Step 5: Solve for x
   x = 42,892,568.68/8,354.72
6. Step 6: Final answer
   x = 5,133.93