Finding the Fourth Proportional to 1,649.30, 2,275.90 and 985.91

Step by Step Solution

1. Step 1: Write the proportion equation
   1,649.30 : 2,275.90 = 985.91 : x
2. Step 2: Convert to fraction form
   1,649.30/2,275.90 = 985.91/x
3. Step 3: Cross multiply
   1,649.30x = 2,275.90 × 985.91
4. Step 4: Simplify right side
   1,649.30x = 2,243,818.72
5. Step 5: Solve for x
   x = 2,243,818.72/1,649.30
6. Step 6: Final answer
   x = 1,360.47