Finding the Fourth Proportional to 1,773.93, 2,661.34 and 678.38

Step by Step Solution

1. Step 1: Write the proportion equation
   1,773.93 : 2,661.34 = 678.38 : x
2. Step 2: Convert to fraction form
   1,773.93/2,661.34 = 678.38/x
3. Step 3: Cross multiply
   1,773.93x = 2,661.34 × 678.38
4. Step 4: Simplify right side
   1,773.93x = 1,805,399.83
5. Step 5: Solve for x
   x = 1,805,399.83/1,773.93
6. Step 6: Final answer
   x = 1,017.74