Finding the Fourth Proportional to 10,255.31, 14,152.34 and 5,539.60

Step by Step Solution

1. Step 1: Write the proportion equation
   10,255.31 : 14,152.34 = 5,539.60 : x
2. Step 2: Convert to fraction form
   10,255.31/14,152.34 = 5,539.60/x
3. Step 3: Cross multiply
   10,255.31x = 14,152.34 × 5,539.60
4. Step 4: Simplify right side
   10,255.31x = 78,398,218.05
5. Step 5: Solve for x
   x = 78,398,218.05/10,255.31
6. Step 6: Final answer
   x = 7,644.64