Finding the Fourth Proportional to 6,128.78, 8,466.33 and 5,465.42

Step by Step Solution

1. Step 1: Write the proportion equation
   6,128.78 : 8,466.33 = 5,465.42 : x
2. Step 2: Convert to fraction form
   6,128.78/8,466.33 = 5,465.42/x
3. Step 3: Cross multiply
   6,128.78x = 8,466.33 × 5,465.42
4. Step 4: Simplify right side
   6,128.78x = 46,272,049.31
5. Step 5: Solve for x
   x = 46,272,049.31/6,128.78
6. Step 6: Final answer
   x = 7,549.96