Finding the Fourth Proportional to 1,367.03, 1,886.31 and 777.53

Step by Step Solution

1. Step 1: Write the proportion equation
   1,367.03 : 1,886.31 = 777.53 : x
2. Step 2: Convert to fraction form
   1,367.03/1,886.31 = 777.53/x
3. Step 3: Cross multiply
   1,367.03x = 1,886.31 × 777.53
4. Step 4: Simplify right side
   1,367.03x = 1,466,662.61
5. Step 5: Solve for x
   x = 1,466,662.61/1,367.03
6. Step 6: Final answer
   x = 1,072.88