Finding the Fourth Proportional to 1,326.38, 1,986.37 and 769.91

Step by Step Solution

1. Step 1: Write the proportion equation
   1,326.38 : 1,986.37 = 769.91 : x
2. Step 2: Convert to fraction form
   1,326.38/1,986.37 = 769.91/x
3. Step 3: Cross multiply
   1,326.38x = 1,986.37 × 769.91
4. Step 4: Simplify right side
   1,326.38x = 1,529,314.27
5. Step 5: Solve for x
   x = 1,529,314.27/1,326.38
6. Step 6: Final answer
   x = 1,153.00