Finding the Fourth Proportional to 1,983.72, 2,737.06 and 1,285

Step by Step Solution

1. Step 1: Write the proportion equation
   1,983.72 : 2,737.06 = 1,285 : x
2. Step 2: Convert to fraction form
   1,983.72/2,737.06 = 1,285/x
3. Step 3: Cross multiply
   1,983.72x = 2,737.06 × 1,285
4. Step 4: Simplify right side
   1,983.72x = 3,517,122.10
5. Step 5: Solve for x
   x = 3,517,122.10/1,983.72
6. Step 6: Final answer
   x = 1,772.99