Finding the Fourth Proportional to 1,366.22, 1,885.50 and 776.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,366.22 : 1,885.50 = 776.72 : x
2. Step 2: Convert to fraction form
   1,366.22/1,885.50 = 776.72/x
3. Step 3: Cross multiply
   1,366.22x = 1,885.50 × 776.72
4. Step 4: Simplify right side
   1,366.22x = 1,464,505.56
5. Step 5: Solve for x
   x = 1,464,505.56/1,366.22
6. Step 6: Final answer
   x = 1,071.94