Finding the Fourth Proportional to 1,269.55, 1,751.86 and 709.98

Step by Step Solution

1. Step 1: Write the proportion equation
   1,269.55 : 1,751.86 = 709.98 : x
2. Step 2: Convert to fraction form
   1,269.55/1,751.86 = 709.98/x
3. Step 3: Cross multiply
   1,269.55x = 1,751.86 × 709.98
4. Step 4: Simplify right side
   1,269.55x = 1,243,785.56
5. Step 5: Solve for x
   x = 1,243,785.56/1,269.55
6. Step 6: Final answer
   x = 979.71