Finding the Fourth Proportional to 2,064.40, 3,095.72 and 678.08

Step by Step Solution

1. Step 1: Write the proportion equation
   2,064.40 : 3,095.72 = 678.08 : x
2. Step 2: Convert to fraction form
   2,064.40/3,095.72 = 678.08/x
3. Step 3: Cross multiply
   2,064.40x = 3,095.72 × 678.08
4. Step 4: Simplify right side
   2,064.40x = 2,099,145.82
5. Step 5: Solve for x
   x = 2,099,145.82/2,064.40
6. Step 6: Final answer
   x = 1,016.83