Finding the Fourth Proportional to 1,340.57, 1,850.72 and 986.19

Step by Step Solution

1. Step 1: Write the proportion equation
   1,340.57 : 1,850.72 = 986.19 : x
2. Step 2: Convert to fraction form
   1,340.57/1,850.72 = 986.19/x
3. Step 3: Cross multiply
   1,340.57x = 1,850.72 × 986.19
4. Step 4: Simplify right side
   1,340.57x = 1,825,156.63
5. Step 5: Solve for x
   x = 1,825,156.63/1,340.57
6. Step 6: Final answer
   x = 1,361.48