Finding the Fourth Proportional to 1,728.64, 2,385.61 and 982.59

Step by Step Solution

1. Step 1: Write the proportion equation
   1,728.64 : 2,385.61 = 982.59 : x
2. Step 2: Convert to fraction form
   1,728.64/2,385.61 = 982.59/x
3. Step 3: Cross multiply
   1,728.64x = 2,385.61 × 982.59
4. Step 4: Simplify right side
   1,728.64x = 2,344,076.53
5. Step 5: Solve for x
   x = 2,344,076.53/1,728.64
6. Step 6: Final answer
   x = 1,356.02