Finding the Fourth Proportional to 2,661.63, 3,991.98 and 713.38

Step by Step Solution

1. Step 1: Write the proportion equation
   2,661.63 : 3,991.98 = 713.38 : x
2. Step 2: Convert to fraction form
   2,661.63/3,991.98 = 713.38/x
3. Step 3: Cross multiply
   2,661.63x = 3,991.98 × 713.38
4. Step 4: Simplify right side
   2,661.63x = 2,847,798.69
5. Step 5: Solve for x
   x = 2,847,798.69/2,661.63
6. Step 6: Final answer
   x = 1,069.95