Finding the Fourth Proportional to 1,767.30, 2,649.15 and 986.10

Step by Step Solution

1. Step 1: Write the proportion equation
   1,767.30 : 2,649.15 = 986.10 : x
2. Step 2: Convert to fraction form
   1,767.30/2,649.15 = 986.10/x
3. Step 3: Cross multiply
   1,767.30x = 2,649.15 × 986.10
4. Step 4: Simplify right side
   1,767.30x = 2,612,326.82
5. Step 5: Solve for x
   x = 2,612,326.82/1,767.30
6. Step 6: Final answer
   x = 1,478.15