Finding the Fourth Proportional to 1,367.55, 1,887.17 and 778.14

Step by Step Solution

1. Step 1: Write the proportion equation
   1,367.55 : 1,887.17 = 778.14 : x
2. Step 2: Convert to fraction form
   1,367.55/1,887.17 = 778.14/x
3. Step 3: Cross multiply
   1,367.55x = 1,887.17 × 778.14
4. Step 4: Simplify right side
   1,367.55x = 1,468,478.57
5. Step 5: Solve for x
   x = 1,468,478.57/1,367.55
6. Step 6: Final answer
   x = 1,073.80