Finding the Fourth Proportional to 6,612.18, 9,123.15 and 4,257.42

Step by Step Solution

1. Step 1: Write the proportion equation
   6,612.18 : 9,123.15 = 4,257.42 : x
2. Step 2: Convert to fraction form
   6,612.18/9,123.15 = 4,257.42/x
3. Step 3: Cross multiply
   6,612.18x = 9,123.15 × 4,257.42
4. Step 4: Simplify right side
   6,612.18x = 38,841,081.27
5. Step 5: Solve for x
   x = 38,841,081.27/6,612.18
6. Step 6: Final answer
   x = 5,874.17