Finding the Fourth Proportional to 10,558.60, 15,840.89 and 5,287.24

Step by Step Solution

1. Step 1: Write the proportion equation
   10,558.60 : 15,840.89 = 5,287.24 : x
2. Step 2: Convert to fraction form
   10,558.60/15,840.89 = 5,287.24/x
3. Step 3: Cross multiply
   10,558.60x = 15,840.89 × 5,287.24
4. Step 4: Simplify right side
   10,558.60x = 83,754,615.26
5. Step 5: Solve for x
   x = 83,754,615.26/10,558.60
6. Step 6: Final answer
   x = 7,932.36