Finding the Fourth Proportional to 1,872.96, 2,584.12 and 1,086.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,872.96 : 2,584.12 = 1,086.72 : x
2. Step 2: Convert to fraction form
   1,872.96/2,584.12 = 1,086.72/x
3. Step 3: Cross multiply
   1,872.96x = 2,584.12 × 1,086.72
4. Step 4: Simplify right side
   1,872.96x = 2,808,214.89
5. Step 5: Solve for x
   x = 2,808,214.89/1,872.96
6. Step 6: Final answer
   x = 1,499.35