Finding the Fourth Proportional to 2,064.81, 3,097.42 and 678.15

Step by Step Solution

1. Step 1: Write the proportion equation
   2,064.81 : 3,097.42 = 678.15 : x
2. Step 2: Convert to fraction form
   2,064.81/3,097.42 = 678.15/x
3. Step 3: Cross multiply
   2,064.81x = 3,097.42 × 678.15
4. Step 4: Simplify right side
   2,064.81x = 2,100,504.24
5. Step 5: Solve for x
   x = 2,100,504.24/2,064.81
6. Step 6: Final answer
   x = 1,017.29