Finding the Fourth Proportional to 2,846.90, 4,271.15 and 1,386.10

Step by Step Solution

1. Step 1: Write the proportion equation
   2,846.90 : 4,271.15 = 1,386.10 : x
2. Step 2: Convert to fraction form
   2,846.90/4,271.15 = 1,386.10/x
3. Step 3: Cross multiply
   2,846.90x = 4,271.15 × 1,386.10
4. Step 4: Simplify right side
   2,846.90x = 5,920,241.02
5. Step 5: Solve for x
   x = 5,920,241.02/2,846.90
6. Step 6: Final answer
   x = 2,079.54