Finding the Fourth Proportional to 1,336.43, 1,844.17 and 776.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,336.43 : 1,844.17 = 776.72 : x
2. Step 2: Convert to fraction form
   1,336.43/1,844.17 = 776.72/x
3. Step 3: Cross multiply
   1,336.43x = 1,844.17 × 776.72
4. Step 4: Simplify right side
   1,336.43x = 1,432,406.39
5. Step 5: Solve for x
   x = 1,432,406.39/1,336.43
6. Step 6: Final answer
   x = 1,071.81