Finding the Fourth Proportional to 3,871.76, 5,810.00 and 1,680.48

Step by Step Solution

1. Step 1: Write the proportion equation
   3,871.76 : 5,810.00 = 1,680.48 : x
2. Step 2: Convert to fraction form
   3,871.76/5,810.00 = 1,680.48/x
3. Step 3: Cross multiply
   3,871.76x = 5,810.00 × 1,680.48
4. Step 4: Simplify right side
   3,871.76x = 9,763,580.40
5. Step 5: Solve for x
   x = 9,763,580.40/3,871.76
6. Step 6: Final answer
   x = 2,521.75