Finding the Fourth Proportional to 11,171.52, 15,422.60 and 7,817.31

Step by Step Solution

1. Step 1: Write the proportion equation
   11,171.52 : 15,422.60 = 7,817.31 : x
2. Step 2: Convert to fraction form
   11,171.52/15,422.60 = 7,817.31/x
3. Step 3: Cross multiply
   11,171.52x = 15,422.60 × 7,817.31
4. Step 4: Simplify right side
   11,171.52x = 120,563,264.75
5. Step 5: Solve for x
   x = 120,563,264.75/11,171.52
6. Step 6: Final answer
   x = 10,792.02