Finding the Fourth Proportional to 1,209.03, 1,667.89 and 711.35

Step by Step Solution

1. Step 1: Write the proportion equation
   1,209.03 : 1,667.89 = 711.35 : x
2. Step 2: Convert to fraction form
   1,209.03/1,667.89 = 711.35/x
3. Step 3: Cross multiply
   1,209.03x = 1,667.89 × 711.35
4. Step 4: Simplify right side
   1,209.03x = 1,186,453.55
5. Step 5: Solve for x
   x = 1,186,453.55/1,209.03
6. Step 6: Final answer
   x = 981.33