Finding the Fourth Proportional to 1,297.33, 1,790.33 and 707.87

Step by Step Solution

1. Step 1: Write the proportion equation
   1,297.33 : 1,790.33 = 707.87 : x
2. Step 2: Convert to fraction form
   1,297.33/1,790.33 = 707.87/x
3. Step 3: Cross multiply
   1,297.33x = 1,790.33 × 707.87
4. Step 4: Simplify right side
   1,297.33x = 1,267,321.83
5. Step 5: Solve for x
   x = 1,267,321.83/1,297.33
6. Step 6: Final answer
   x = 976.87