Finding the Fourth Proportional to 1,872.63, 2,584.07 and 1,086.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,872.63 : 2,584.07 = 1,086.72 : x
2. Step 2: Convert to fraction form
   1,872.63/2,584.07 = 1,086.72/x
3. Step 3: Cross multiply
   1,872.63x = 2,584.07 × 1,086.72
4. Step 4: Simplify right side
   1,872.63x = 2,808,160.55
5. Step 5: Solve for x
   x = 2,808,160.55/1,872.63
6. Step 6: Final answer
   x = 1,499.58