Finding the Fourth Proportional to 9,742.42, 13,445.31 and 5,550.58

Step by Step Solution

1. Step 1: Write the proportion equation
   9,742.42 : 13,445.31 = 5,550.58 : x
2. Step 2: Convert to fraction form
   9,742.42/13,445.31 = 5,550.58/x
3. Step 3: Cross multiply
   9,742.42x = 13,445.31 × 5,550.58
4. Step 4: Simplify right side
   9,742.42x = 74,629,268.78
5. Step 5: Solve for x
   x = 74,629,268.78/9,742.42
6. Step 6: Final answer
   x = 7,660.24