Finding the Fourth Proportional to 2,423.81, 3,634.56 and 779.91

Step by Step Solution

1. Step 1: Write the proportion equation
   2,423.81 : 3,634.56 = 779.91 : x
2. Step 2: Convert to fraction form
   2,423.81/3,634.56 = 779.91/x
3. Step 3: Cross multiply
   2,423.81x = 3,634.56 × 779.91
4. Step 4: Simplify right side
   2,423.81x = 2,834,629.69
5. Step 5: Solve for x
   x = 2,834,629.69/2,423.81
6. Step 6: Final answer
   x = 1,169.50