Finding the Fourth Proportional to 2,820.02, 3,891.71 and 1,874.16

Step by Step Solution

1. Step 1: Write the proportion equation
   2,820.02 : 3,891.71 = 1,874.16 : x
2. Step 2: Convert to fraction form
   2,820.02/3,891.71 = 1,874.16/x
3. Step 3: Cross multiply
   2,820.02x = 3,891.71 × 1,874.16
4. Step 4: Simplify right side
   2,820.02x = 7,293,691.90
5. Step 5: Solve for x
   x = 7,293,691.90/2,820.02
6. Step 6: Final answer
   x = 2,586.40