Finding the Fourth Proportional to 3,913.48, 5,870.68 and 1,721.94

Step by Step Solution

1. Step 1: Write the proportion equation
   3,913.48 : 5,870.68 = 1,721.94 : x
2. Step 2: Convert to fraction form
   3,913.48/5,870.68 = 1,721.94/x
3. Step 3: Cross multiply
   3,913.48x = 5,870.68 × 1,721.94
4. Step 4: Simplify right side
   3,913.48x = 10,108,958.72
5. Step 5: Solve for x
   x = 10,108,958.72/3,913.48
6. Step 6: Final answer
   x = 2,583.11