Finding the Fourth Proportional to 2,883.12, 3,979.31 and 1,886.55

Step by Step Solution

1. Step 1: Write the proportion equation
   2,883.12 : 3,979.31 = 1,886.55 : x
2. Step 2: Convert to fraction form
   2,883.12/3,979.31 = 1,886.55/x
3. Step 3: Cross multiply
   2,883.12x = 3,979.31 × 1,886.55
4. Step 4: Simplify right side
   2,883.12x = 7,507,167.28
5. Step 5: Solve for x
   x = 7,507,167.28/2,883.12
6. Step 6: Final answer
   x = 2,603.83