Finding the Fourth Proportional to 2,612.67, 3,606.17 and 1,728.15

Step by Step Solution

1. Step 1: Write the proportion equation
   2,612.67 : 3,606.17 = 1,728.15 : x
2. Step 2: Convert to fraction form
   2,612.67/3,606.17 = 1,728.15/x
3. Step 3: Cross multiply
   2,612.67x = 3,606.17 × 1,728.15
4. Step 4: Simplify right side
   2,612.67x = 6,232,002.69
5. Step 5: Solve for x
   x = 6,232,002.69/2,612.67
6. Step 6: Final answer
   x = 2,385.30