Finding the Fourth Proportional to 2,862.89, 4,288.71 and 1,886.03

Step by Step Solution

1. Step 1: Write the proportion equation
   2,862.89 : 4,288.71 = 1,886.03 : x
2. Step 2: Convert to fraction form
   2,862.89/4,288.71 = 1,886.03/x
3. Step 3: Cross multiply
   2,862.89x = 4,288.71 × 1,886.03
4. Step 4: Simplify right side
   2,862.89x = 8,088,635.72
5. Step 5: Solve for x
   x = 8,088,635.72/2,862.89
6. Step 6: Final answer
   x = 2,825.34