Finding the Fourth Proportional to 3,939.76, 5,910.86 and 1,748.31

Step by Step Solution

1. Step 1: Write the proportion equation
   3,939.76 : 5,910.86 = 1,748.31 : x
2. Step 2: Convert to fraction form
   3,939.76/5,910.86 = 1,748.31/x
3. Step 3: Cross multiply
   3,939.76x = 5,910.86 × 1,748.31
4. Step 4: Simplify right side
   3,939.76x = 10,334,015.65
5. Step 5: Solve for x
   x = 10,334,015.65/3,939.76
6. Step 6: Final answer
   x = 2,623.01