Finding the Fourth Proportional to 1,297.56, 1,790.52 and 708.06

Step by Step Solution

1. Step 1: Write the proportion equation
   1,297.56 : 1,790.52 = 708.06 : x
2. Step 2: Convert to fraction form
   1,297.56/1,790.52 = 708.06/x
3. Step 3: Cross multiply
   1,297.56x = 1,790.52 × 708.06
4. Step 4: Simplify right side
   1,297.56x = 1,267,795.59
5. Step 5: Solve for x
   x = 1,267,795.59/1,297.56
6. Step 6: Final answer
   x = 977.06