Finding the Fourth Proportional to 2,396.16, 3,303.72 and 1,978.20

Step by Step Solution

1. Step 1: Write the proportion equation
   2,396.16 : 3,303.72 = 1,978.20 : x
2. Step 2: Convert to fraction form
   2,396.16/3,303.72 = 1,978.20/x
3. Step 3: Cross multiply
   2,396.16x = 3,303.72 × 1,978.20
4. Step 4: Simplify right side
   2,396.16x = 6,535,418.90
5. Step 5: Solve for x
   x = 6,535,418.90/2,396.16
6. Step 6: Final answer
   x = 2,727.46