Finding the Fourth Proportional to 1,367.46, 1,886.77 and 778.32

Step by Step Solution

1. Step 1: Write the proportion equation
   1,367.46 : 1,886.77 = 778.32 : x
2. Step 2: Convert to fraction form
   1,367.46/1,886.77 = 778.32/x
3. Step 3: Cross multiply
   1,367.46x = 1,886.77 × 778.32
4. Step 4: Simplify right side
   1,367.46x = 1,468,497.50
5. Step 5: Solve for x
   x = 1,468,497.50/1,367.46
6. Step 6: Final answer
   x = 1,073.89