Finding the Fourth Proportional to 1,270.42, 1,753.06 and 710.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,270.42 : 1,753.06 = 710.72 : x
2. Step 2: Convert to fraction form
   1,270.42/1,753.06 = 710.72/x
3. Step 3: Cross multiply
   1,270.42x = 1,753.06 × 710.72
4. Step 4: Simplify right side
   1,270.42x = 1,245,934.80
5. Step 5: Solve for x
   x = 1,245,934.80/1,270.42
6. Step 6: Final answer
   x = 980.73