Finding the Fourth Proportional to 1,298.94, 1,792.41 and 709.47

Step by Step Solution

1. Step 1: Write the proportion equation
   1,298.94 : 1,792.41 = 709.47 : x
2. Step 2: Convert to fraction form
   1,298.94/1,792.41 = 709.47/x
3. Step 3: Cross multiply
   1,298.94x = 1,792.41 × 709.47
4. Step 4: Simplify right side
   1,298.94x = 1,271,661.12
5. Step 5: Solve for x
   x = 1,271,661.12/1,298.94
6. Step 6: Final answer
   x = 979.00