Finding the Fourth Proportional to 3,970.16, 5,478.42 and 2,376.48

Step by Step Solution

1. Step 1: Write the proportion equation
   3,970.16 : 5,478.42 = 2,376.48 : x
2. Step 2: Convert to fraction form
   3,970.16/5,478.42 = 2,376.48/x
3. Step 3: Cross multiply
   3,970.16x = 5,478.42 × 2,376.48
4. Step 4: Simplify right side
   3,970.16x = 13,019,355.56
5. Step 5: Solve for x
   x = 13,019,355.56/3,970.16
6. Step 6: Final answer
   x = 3,279.30