Finding the Fourth Proportional to 2,487.15, 3,729.89 and 1,253.78

Step by Step Solution

1. Step 1: Write the proportion equation
   2,487.15 : 3,729.89 = 1,253.78 : x
2. Step 2: Convert to fraction form
   2,487.15/3,729.89 = 1,253.78/x
3. Step 3: Cross multiply
   2,487.15x = 3,729.89 × 1,253.78
4. Step 4: Simplify right side
   2,487.15x = 4,676,442.83
5. Step 5: Solve for x
   x = 4,676,442.83/2,487.15
6. Step 6: Final answer
   x = 1,880.24