Finding the Fourth Proportional to 1,458.31, 2,012.17 and 986.29

Step by Step Solution

1. Step 1: Write the proportion equation
   1,458.31 : 2,012.17 = 986.29 : x
2. Step 2: Convert to fraction form
   1,458.31/2,012.17 = 986.29/x
3. Step 3: Cross multiply
   1,458.31x = 2,012.17 × 986.29
4. Step 4: Simplify right side
   1,458.31x = 1,984,583.15
5. Step 5: Solve for x
   x = 1,984,583.15/1,458.31
6. Step 6: Final answer
   x = 1,360.88