Finding the Fourth Proportional to 6,300.78, 9,455.46 and 2,196.78

Step by Step Solution

1. Step 1: Write the proportion equation
   6,300.78 : 9,455.46 = 2,196.78 : x
2. Step 2: Convert to fraction form
   6,300.78/9,455.46 = 2,196.78/x
3. Step 3: Cross multiply
   6,300.78x = 9,455.46 × 2,196.78
4. Step 4: Simplify right side
   6,300.78x = 20,771,565.42
5. Step 5: Solve for x
   x = 20,771,565.42/6,300.78
6. Step 6: Final answer
   x = 3,296.67