Finding the Fourth Proportional to 1,298.88, 1,792.50 and 709.46

Step by Step Solution

1. Step 1: Write the proportion equation
   1,298.88 : 1,792.50 = 709.46 : x
2. Step 2: Convert to fraction form
   1,298.88/1,792.50 = 709.46/x
3. Step 3: Cross multiply
   1,298.88x = 1,792.50 × 709.46
4. Step 4: Simplify right side
   1,298.88x = 1,271,702.15
5. Step 5: Solve for x
   x = 1,271,702.15/1,298.88
6. Step 6: Final answer
   x = 979.08