Finding the Fourth Proportional to 1,366.17, 1,885.25 and 776.73

Step by Step Solution

1. Step 1: Write the proportion equation
   1,366.17 : 1,885.25 = 776.73 : x
2. Step 2: Convert to fraction form
   1,366.17/1,885.25 = 776.73/x
3. Step 3: Cross multiply
   1,366.17x = 1,885.25 × 776.73
4. Step 4: Simplify right side
   1,366.17x = 1,464,326.35
5. Step 5: Solve for x
   x = 1,464,326.35/1,366.17
6. Step 6: Final answer
   x = 1,071.85