Finding the Fourth Proportional to 1,662.93, 2,493.59 and 688.77

Step by Step Solution

1. Step 1: Write the proportion equation
   1,662.93 : 2,493.59 = 688.77 : x
2. Step 2: Convert to fraction form
   1,662.93/2,493.59 = 688.77/x
3. Step 3: Cross multiply
   1,662.93x = 2,493.59 × 688.77
4. Step 4: Simplify right side
   1,662.93x = 1,717,506.54
5. Step 5: Solve for x
   x = 1,717,506.54/1,662.93
6. Step 6: Final answer
   x = 1,032.82