Finding the Fourth Proportional to 1,872.90, 2,584.17 and 1,086.48

Step by Step Solution

1. Step 1: Write the proportion equation
   1,872.90 : 2,584.17 = 1,086.48 : x
2. Step 2: Convert to fraction form
   1,872.90/2,584.17 = 1,086.48/x
3. Step 3: Cross multiply
   1,872.90x = 2,584.17 × 1,086.48
4. Step 4: Simplify right side
   1,872.90x = 2,807,649.02
5. Step 5: Solve for x
   x = 2,807,649.02/1,872.90
6. Step 6: Final answer
   x = 1,499.09