Finding the Fourth Proportional to 2,065.86, 3,097.74 and 678.90

Step by Step Solution

1. Step 1: Write the proportion equation
   2,065.86 : 3,097.74 = 678.90 : x
2. Step 2: Convert to fraction form
   2,065.86/3,097.74 = 678.90/x
3. Step 3: Cross multiply
   2,065.86x = 3,097.74 × 678.90
4. Step 4: Simplify right side
   2,065.86x = 2,103,055.69
5. Step 5: Solve for x
   x = 2,103,055.69/2,065.86
6. Step 6: Final answer
   x = 1,018.00