Finding the Fourth Proportional to 1,863.05, 2,571.47 and 1,077.55

Step by Step Solution

1. Step 1: Write the proportion equation
   1,863.05 : 2,571.47 = 1,077.55 : x
2. Step 2: Convert to fraction form
   1,863.05/2,571.47 = 1,077.55/x
3. Step 3: Cross multiply
   1,863.05x = 2,571.47 × 1,077.55
4. Step 4: Simplify right side
   1,863.05x = 2,770,887.50
5. Step 5: Solve for x
   x = 2,770,887.50/1,863.05
6. Step 6: Final answer
   x = 1,487.29