Finding the Fourth Proportional to 2,515.88, 3,470.46 and 1,728.56

Step by Step Solution

1. Step 1: Write the proportion equation
   2,515.88 : 3,470.46 = 1,728.56 : x
2. Step 2: Convert to fraction form
   2,515.88/3,470.46 = 1,728.56/x
3. Step 3: Cross multiply
   2,515.88x = 3,470.46 × 1,728.56
4. Step 4: Simplify right side
   2,515.88x = 5,998,898.34
5. Step 5: Solve for x
   x = 5,998,898.34/2,515.88
6. Step 6: Final answer
   x = 2,384.41