Finding the Fourth Proportional to 1,339.90, 1,850.82 and 986.54

Step by Step Solution

1. Step 1: Write the proportion equation
   1,339.90 : 1,850.82 = 986.54 : x
2. Step 2: Convert to fraction form
   1,339.90/1,850.82 = 986.54/x
3. Step 3: Cross multiply
   1,339.90x = 1,850.82 × 986.54
4. Step 4: Simplify right side
   1,339.90x = 1,825,895.01
5. Step 5: Solve for x
   x = 1,825,895.01/1,339.90
6. Step 6: Final answer
   x = 1,362.71