Finding the Fourth Proportional to 1,269.69, 1,752.17 and 710.21

Step by Step Solution

1. Step 1: Write the proportion equation
   1,269.69 : 1,752.17 = 710.21 : x
2. Step 2: Convert to fraction form
   1,269.69/1,752.17 = 710.21/x
3. Step 3: Cross multiply
   1,269.69x = 1,752.17 × 710.21
4. Step 4: Simplify right side
   1,269.69x = 1,244,396.34
5. Step 5: Solve for x
   x = 1,244,396.34/1,269.69
6. Step 6: Final answer
   x = 980.08