Finding the Fourth Proportional to 1,335.91, 1,843.69 and 776.34

Step by Step Solution

1. Step 1: Write the proportion equation
   1,335.91 : 1,843.69 = 776.34 : x
2. Step 2: Convert to fraction form
   1,335.91/1,843.69 = 776.34/x
3. Step 3: Cross multiply
   1,335.91x = 1,843.69 × 776.34
4. Step 4: Simplify right side
   1,335.91x = 1,431,330.29
5. Step 5: Solve for x
   x = 1,431,330.29/1,335.91
6. Step 6: Final answer
   x = 1,071.43