Finding the Fourth Proportional to 1,728.32, 2,581.79 and 1,554.71

Step by Step Solution

1. Step 1: Write the proportion equation
   1,728.32 : 2,581.79 = 1,554.71 : x
2. Step 2: Convert to fraction form
   1,728.32/2,581.79 = 1,554.71/x
3. Step 3: Cross multiply
   1,728.32x = 2,581.79 × 1,554.71
4. Step 4: Simplify right side
   1,728.32x = 4,013,934.73
5. Step 5: Solve for x
   x = 4,013,934.73/1,728.32
6. Step 6: Final answer
   x = 2,322.45