Finding the Fourth Proportional to 2,978.02, 4,456.50 and 2,196.18

Step by Step Solution

1. Step 1: Write the proportion equation
   2,978.02 : 4,456.50 = 2,196.18 : x
2. Step 2: Convert to fraction form
   2,978.02/4,456.50 = 2,196.18/x
3. Step 3: Cross multiply
   2,978.02x = 4,456.50 × 2,196.18
4. Step 4: Simplify right side
   2,978.02x = 9,787,276.17
5. Step 5: Solve for x
   x = 9,787,276.17/2,978.02
6. Step 6: Final answer
   x = 3,286.50