Finding the Fourth Proportional to 1,270.98, 1,753.89 and 711.45

Step by Step Solution

1. Step 1: Write the proportion equation
   1,270.98 : 1,753.89 = 711.45 : x
2. Step 2: Convert to fraction form
   1,270.98/1,753.89 = 711.45/x
3. Step 3: Cross multiply
   1,270.98x = 1,753.89 × 711.45
4. Step 4: Simplify right side
   1,270.98x = 1,247,808.38
5. Step 5: Solve for x
   x = 1,247,808.38/1,270.98
6. Step 6: Final answer
   x = 981.77