Finding the Fourth Proportional to 3,948.48, 5,887.76 and 3,680.40

Step by Step Solution

1. Step 1: Write the proportion equation
   3,948.48 : 5,887.76 = 3,680.40 : x
2. Step 2: Convert to fraction form
   3,948.48/5,887.76 = 3,680.40/x
3. Step 3: Cross multiply
   3,948.48x = 5,887.76 × 3,680.40
4. Step 4: Simplify right side
   3,948.48x = 21,669,311.90
5. Step 5: Solve for x
   x = 21,669,311.90/3,948.48
6. Step 6: Final answer
   x = 5,488.01