Finding the Fourth Proportional to 1,872.59, 2,583.60 and 1,086.48

Step by Step Solution

1. Step 1: Write the proportion equation
   1,872.59 : 2,583.60 = 1,086.48 : x
2. Step 2: Convert to fraction form
   1,872.59/2,583.60 = 1,086.48/x
3. Step 3: Cross multiply
   1,872.59x = 2,583.60 × 1,086.48
4. Step 4: Simplify right side
   1,872.59x = 2,807,025.65
5. Step 5: Solve for x
   x = 2,807,025.65/1,872.59
6. Step 6: Final answer
   x = 1,499.01