Finding the Fourth Proportional to 1,298.82, 1,792.42 and 709.38

Step by Step Solution

1. Step 1: Write the proportion equation
   1,298.82 : 1,792.42 = 709.38 : x
2. Step 2: Convert to fraction form
   1,298.82/1,792.42 = 709.38/x
3. Step 3: Cross multiply
   1,298.82x = 1,792.42 × 709.38
4. Step 4: Simplify right side
   1,298.82x = 1,271,506.90
5. Step 5: Solve for x
   x = 1,271,506.90/1,298.82
6. Step 6: Final answer
   x = 978.97