Finding the Fourth Proportional to 1,208.42, 1,667.13 and 710.88

Step by Step Solution

1. Step 1: Write the proportion equation
   1,208.42 : 1,667.13 = 710.88 : x
2. Step 2: Convert to fraction form
   1,208.42/1,667.13 = 710.88/x
3. Step 3: Cross multiply
   1,208.42x = 1,667.13 × 710.88
4. Step 4: Simplify right side
   1,208.42x = 1,185,124.46
5. Step 5: Solve for x
   x = 1,185,124.46/1,208.42
6. Step 6: Final answer
   x = 980.72