Finding the Fourth Proportional to 2,645.59, 3,968.79 and 697.95

Step by Step Solution

1. Step 1: Write the proportion equation
   2,645.59 : 3,968.79 = 697.95 : x
2. Step 2: Convert to fraction form
   2,645.59/3,968.79 = 697.95/x
3. Step 3: Cross multiply
   2,645.59x = 3,968.79 × 697.95
4. Step 4: Simplify right side
   2,645.59x = 2,770,016.98
5. Step 5: Solve for x
   x = 2,770,016.98/2,645.59
6. Step 6: Final answer
   x = 1,047.03