Finding the Fourth Proportional to 1,747.62, 2,620.17 and 822.74

Step by Step Solution

1. Step 1: Write the proportion equation
   1,747.62 : 2,620.17 = 822.74 : x
2. Step 2: Convert to fraction form
   1,747.62/2,620.17 = 822.74/x
3. Step 3: Cross multiply
   1,747.62x = 2,620.17 × 822.74
4. Step 4: Simplify right side
   1,747.62x = 2,155,705.56
5. Step 5: Solve for x
   x = 2,155,705.56/1,747.62
6. Step 6: Final answer
   x = 1,233.51