Finding the Fourth Proportional to 1,205.93, 1,663.89 and 708.59

Step by Step Solution

1. Step 1: Write the proportion equation
   1,205.93 : 1,663.89 = 708.59 : x
2. Step 2: Convert to fraction form
   1,205.93/1,663.89 = 708.59/x
3. Step 3: Cross multiply
   1,205.93x = 1,663.89 × 708.59
4. Step 4: Simplify right side
   1,205.93x = 1,179,015.82
5. Step 5: Solve for x
   x = 1,179,015.82/1,205.93
6. Step 6: Final answer
   x = 977.68