Finding the Fourth Proportional to 1,366.72, 1,886.02 and 769.19

Step by Step Solution

1. Step 1: Write the proportion equation
   1,366.72 : 1,886.02 = 769.19 : x
2. Step 2: Convert to fraction form
   1,366.72/1,886.02 = 769.19/x
3. Step 3: Cross multiply
   1,366.72x = 1,886.02 × 769.19
4. Step 4: Simplify right side
   1,366.72x = 1,450,696.37
5. Step 5: Solve for x
   x = 1,450,696.37/1,366.72
6. Step 6: Final answer
   x = 1,061.45