Finding the Fourth Proportional to 1,208.35, 1,667.75 and 710.96

Step by Step Solution

1. Step 1: Write the proportion equation
   1,208.35 : 1,667.75 = 710.96 : x
2. Step 2: Convert to fraction form
   1,208.35/1,667.75 = 710.96/x
3. Step 3: Cross multiply
   1,208.35x = 1,667.75 × 710.96
4. Step 4: Simplify right side
   1,208.35x = 1,185,704.15
5. Step 5: Solve for x
   x = 1,185,704.15/1,208.35
6. Step 6: Final answer
   x = 981.26