Finding the Fourth Proportional to 1,649.79, 2,276.61 and 986.31

Step by Step Solution

1. Step 1: Write the proportion equation
   1,649.79 : 2,276.61 = 986.31 : x
2. Step 2: Convert to fraction form
   1,649.79/2,276.61 = 986.31/x
3. Step 3: Cross multiply
   1,649.79x = 2,276.61 × 986.31
4. Step 4: Simplify right side
   1,649.79x = 2,245,443.21
5. Step 5: Solve for x
   x = 2,245,443.21/1,649.79
6. Step 6: Final answer
   x = 1,361.05