Finding the Fourth Proportional to 1,727.85, 2,385.89 and 1,170.17

Step by Step Solution

1. Step 1: Write the proportion equation
   1,727.85 : 2,385.89 = 1,170.17 : x
2. Step 2: Convert to fraction form
   1,727.85/2,385.89 = 1,170.17/x
3. Step 3: Cross multiply
   1,727.85x = 2,385.89 × 1,170.17
4. Step 4: Simplify right side
   1,727.85x = 2,791,896.90
5. Step 5: Solve for x
   x = 2,791,896.90/1,727.85
6. Step 6: Final answer
   x = 1,615.82