Finding the Fourth Proportional to 3,864.57, 5,331.15 and 2,445.89

Step by Step Solution

1. Step 1: Write the proportion equation
   3,864.57 : 5,331.15 = 2,445.89 : x
2. Step 2: Convert to fraction form
   3,864.57/5,331.15 = 2,445.89/x
3. Step 3: Cross multiply
   3,864.57x = 5,331.15 × 2,445.89
4. Step 4: Simplify right side
   3,864.57x = 13,039,379.82
5. Step 5: Solve for x
   x = 13,039,379.82/3,864.57
6. Step 6: Final answer
   x = 3,374.08