Finding the Fourth Proportional to 1,439.00, 1,986.62 and 1,340.58

Step by Step Solution

1. Step 1: Write the proportion equation
   1,439.00 : 1,986.62 = 1,340.58 : x
2. Step 2: Convert to fraction form
   1,439.00/1,986.62 = 1,340.58/x
3. Step 3: Cross multiply
   1,439.00x = 1,986.62 × 1,340.58
4. Step 4: Simplify right side
   1,439.00x = 2,663,216.34
5. Step 5: Solve for x
   x = 2,663,216.34/1,439.00
6. Step 6: Final answer
   x = 1,850.75