Finding the Fourth Proportional to 1,366.27, 1,885.48 and 776.79

Step by Step Solution

1. Step 1: Write the proportion equation
   1,366.27 : 1,885.48 = 776.79 : x
2. Step 2: Convert to fraction form
   1,366.27/1,885.48 = 776.79/x
3. Step 3: Cross multiply
   1,366.27x = 1,885.48 × 776.79
4. Step 4: Simplify right side
   1,366.27x = 1,464,620.07
5. Step 5: Solve for x
   x = 1,464,620.07/1,366.27
6. Step 6: Final answer
   x = 1,071.99