Finding the Fourth Proportional to 1,300.28, 1,794.39 and 776.30

Step by Step Solution

1. Step 1: Write the proportion equation
   1,300.28 : 1,794.39 = 776.30 : x
2. Step 2: Convert to fraction form
   1,300.28/1,794.39 = 776.30/x
3. Step 3: Cross multiply
   1,300.28x = 1,794.39 × 776.30
4. Step 4: Simplify right side
   1,300.28x = 1,392,984.96
5. Step 5: Solve for x
   x = 1,392,984.96/1,300.28
6. Step 6: Final answer
   x = 1,071.30