Finding the Fourth Proportional to 1,648.83, 2,275.43 and 986.06

Step by Step Solution

1. Step 1: Write the proportion equation
   1,648.83 : 2,275.43 = 986.06 : x
2. Step 2: Convert to fraction form
   1,648.83/2,275.43 = 986.06/x
3. Step 3: Cross multiply
   1,648.83x = 2,275.43 × 986.06
4. Step 4: Simplify right side
   1,648.83x = 2,243,718.66
5. Step 5: Solve for x
   x = 2,243,718.66/1,648.83
6. Step 6: Final answer
   x = 1,360.80