Finding the Fourth Proportional to 6,123.42, 9,168.72 and 5,040.90

Step by Step Solution

1. Step 1: Write the proportion equation
   6,123.42 : 9,168.72 = 5,040.90 : x
2. Step 2: Convert to fraction form
   6,123.42/9,168.72 = 5,040.90/x
3. Step 3: Cross multiply
   6,123.42x = 9,168.72 × 5,040.90
4. Step 4: Simplify right side
   6,123.42x = 46,218,600.65
5. Step 5: Solve for x
   x = 46,218,600.65/6,123.42
6. Step 6: Final answer
   x = 7,547.84