Finding the Fourth Proportional to 6,123.72, 9,180.20 and 2,428.55

Step by Step Solution

1. Step 1: Write the proportion equation
   6,123.72 : 9,180.20 = 2,428.55 : x
2. Step 2: Convert to fraction form
   6,123.72/9,180.20 = 2,428.55/x
3. Step 3: Cross multiply
   6,123.72x = 9,180.20 × 2,428.55
4. Step 4: Simplify right side
   6,123.72x = 22,294,574.71
5. Step 5: Solve for x
   x = 22,294,574.71/6,123.72
6. Step 6: Final answer
   x = 3,640.69