Finding the Fourth Proportional to 1,820.18, 2,728.85 and 846.15

Step by Step Solution

1. Step 1: Write the proportion equation
   1,820.18 : 2,728.85 = 846.15 : x
2. Step 2: Convert to fraction form
   1,820.18/2,728.85 = 846.15/x
3. Step 3: Cross multiply
   1,820.18x = 2,728.85 × 846.15
4. Step 4: Simplify right side
   1,820.18x = 2,309,012.20
5. Step 5: Solve for x
   x = 2,309,012.20/1,820.18
6. Step 6: Final answer
   x = 1,268.57