Finding the Fourth Proportional to 1,872.72, 2,584.04 and 1,086.64

Step by Step Solution

1. Step 1: Write the proportion equation
   1,872.72 : 2,584.04 = 1,086.64 : x
2. Step 2: Convert to fraction form
   1,872.72/2,584.04 = 1,086.64/x
3. Step 3: Cross multiply
   1,872.72x = 2,584.04 × 1,086.64
4. Step 4: Simplify right side
   1,872.72x = 2,807,921.23
5. Step 5: Solve for x
   x = 2,807,921.23/1,872.72
6. Step 6: Final answer
   x = 1,499.38