Finding the Fourth Proportional to 1,366.71, 1,885.99 and 777.17

Step by Step Solution

1. Step 1: Write the proportion equation
   1,366.71 : 1,885.99 = 777.17 : x
2. Step 2: Convert to fraction form
   1,366.71/1,885.99 = 777.17/x
3. Step 3: Cross multiply
   1,366.71x = 1,885.99 × 777.17
4. Step 4: Simplify right side
   1,366.71x = 1,465,734.85
5. Step 5: Solve for x
   x = 1,465,734.85/1,366.71
6. Step 6: Final answer
   x = 1,072.45