Finding the Fourth Proportional to 1,727.91, 2,380.59 and 1,285.11

Step by Step Solution

1. Step 1: Write the proportion equation
   1,727.91 : 2,380.59 = 1,285.11 : x
2. Step 2: Convert to fraction form
   1,727.91/2,380.59 = 1,285.11/x
3. Step 3: Cross multiply
   1,727.91x = 2,380.59 × 1,285.11
4. Step 4: Simplify right side
   1,727.91x = 3,059,320.01
5. Step 5: Solve for x
   x = 3,059,320.01/1,727.91
6. Step 6: Final answer
   x = 1,770.53