Finding the Fourth Proportional to 1,336.78, 1,844.79 and 812.50

Step by Step Solution

1. Step 1: Write the proportion equation
   1,336.78 : 1,844.79 = 812.50 : x
2. Step 2: Convert to fraction form
   1,336.78/1,844.79 = 812.50/x
3. Step 3: Cross multiply
   1,336.78x = 1,844.79 × 812.50
4. Step 4: Simplify right side
   1,336.78x = 1,498,891.88
5. Step 5: Solve for x
   x = 1,498,891.88/1,336.78
6. Step 6: Final answer
   x = 1,121.27