Finding the Fourth Proportional to 3,921.05, 5,877.93 and 1,728.59

Step by Step Solution

1. Step 1: Write the proportion equation
   3,921.05 : 5,877.93 = 1,728.59 : x
2. Step 2: Convert to fraction form
   3,921.05/5,877.93 = 1,728.59/x
3. Step 3: Cross multiply
   3,921.05x = 5,877.93 × 1,728.59
4. Step 4: Simplify right side
   3,921.05x = 10,160,501.63
5. Step 5: Solve for x
   x = 10,160,501.63/3,921.05
6. Step 6: Final answer
   x = 2,591.27