Finding the Fourth Proportional to 3,921.33, 5,880.43 and 1,728.50

Step by Step Solution

1. Step 1: Write the proportion equation
   3,921.33 : 5,880.43 = 1,728.50 : x
2. Step 2: Convert to fraction form
   3,921.33/5,880.43 = 1,728.50/x
3. Step 3: Cross multiply
   3,921.33x = 5,880.43 × 1,728.50
4. Step 4: Simplify right side
   3,921.33x = 10,164,314.61
5. Step 5: Solve for x
   x = 10,164,314.61/3,921.33
6. Step 6: Final answer
   x = 2,592.06