Finding the Fourth Proportional to 1,208.75, 1,667.54 and 711.23

Step by Step Solution

1. Step 1: Write the proportion equation
   1,208.75 : 1,667.54 = 711.23 : x
2. Step 2: Convert to fraction form
   1,208.75/1,667.54 = 711.23/x
3. Step 3: Cross multiply
   1,208.75x = 1,667.54 × 711.23
4. Step 4: Simplify right side
   1,208.75x = 1,185,997.91
5. Step 5: Solve for x
   x = 1,185,997.91/1,208.75
6. Step 6: Final answer
   x = 981.18