Finding the Fourth Proportional to 1,367.22, 1,886.88 and 777.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,367.22 : 1,886.88 = 777.72 : x
2. Step 2: Convert to fraction form
   1,367.22/1,886.88 = 777.72/x
3. Step 3: Cross multiply
   1,367.22x = 1,886.88 × 777.72
4. Step 4: Simplify right side
   1,367.22x = 1,467,464.31
5. Step 5: Solve for x
   x = 1,467,464.31/1,367.22
6. Step 6: Final answer
   x = 1,073.32