Finding the Fourth Proportional to 1,366.07, 1,885.33 and 776.69

Step by Step Solution

1. Step 1: Write the proportion equation
   1,366.07 : 1,885.33 = 776.69 : x
2. Step 2: Convert to fraction form
   1,366.07/1,885.33 = 776.69/x
3. Step 3: Cross multiply
   1,366.07x = 1,885.33 × 776.69
4. Step 4: Simplify right side
   1,366.07x = 1,464,323.61
5. Step 5: Solve for x
   x = 1,464,323.61/1,366.07
6. Step 6: Final answer
   x = 1,071.93