Finding the Fourth Proportional to 1,366.72, 1,886.04 and 777.32

Step by Step Solution

1. Step 1: Write the proportion equation
   1,366.72 : 1,886.04 = 777.32 : x
2. Step 2: Convert to fraction form
   1,366.72/1,886.04 = 777.32/x
3. Step 3: Cross multiply
   1,366.72x = 1,886.04 × 777.32
4. Step 4: Simplify right side
   1,366.72x = 1,466,056.61
5. Step 5: Solve for x
   x = 1,466,056.61/1,366.72
6. Step 6: Final answer
   x = 1,072.68