Finding the Fourth Proportional to 1,336.07, 1,843.76 and 776.86

Step by Step Solution

1. Step 1: Write the proportion equation
   1,336.07 : 1,843.76 = 776.86 : x
2. Step 2: Convert to fraction form
   1,336.07/1,843.76 = 776.86/x
3. Step 3: Cross multiply
   1,336.07x = 1,843.76 × 776.86
4. Step 4: Simplify right side
   1,336.07x = 1,432,343.39
5. Step 5: Solve for x
   x = 1,432,343.39/1,336.07
6. Step 6: Final answer
   x = 1,072.06