Finding the Fourth Proportional to 1,367.68, 1,887.15 and 778.09

Step by Step Solution

1. Step 1: Write the proportion equation
   1,367.68 : 1,887.15 = 778.09 : x
2. Step 2: Convert to fraction form
   1,367.68/1,887.15 = 778.09/x
3. Step 3: Cross multiply
   1,367.68x = 1,887.15 × 778.09
4. Step 4: Simplify right side
   1,367.68x = 1,468,372.54
5. Step 5: Solve for x
   x = 1,468,372.54/1,367.68
6. Step 6: Final answer
   x = 1,073.62