Finding the Fourth Proportional to 1,268.96, 1,751.15 and 709.42

Step by Step Solution

1. Step 1: Write the proportion equation
   1,268.96 : 1,751.15 = 709.42 : x
2. Step 2: Convert to fraction form
   1,268.96/1,751.15 = 709.42/x
3. Step 3: Cross multiply
   1,268.96x = 1,751.15 × 709.42
4. Step 4: Simplify right side
   1,268.96x = 1,242,298.23
5. Step 5: Solve for x
   x = 1,242,298.23/1,268.96
6. Step 6: Final answer
   x = 978.99