Finding the Fourth Proportional to 1,793.72, 2,691.94 and 820.50

Step by Step Solution

1. Step 1: Write the proportion equation
   1,793.72 : 2,691.94 = 820.50 : x
2. Step 2: Convert to fraction form
   1,793.72/2,691.94 = 820.50/x
3. Step 3: Cross multiply
   1,793.72x = 2,691.94 × 820.50
4. Step 4: Simplify right side
   1,793.72x = 2,208,736.77
5. Step 5: Solve for x
   x = 2,208,736.77/1,793.72
6. Step 6: Final answer
   x = 1,231.37