Finding the Fourth Proportional to 2,123.22, 3,181.89 and 805.62

Step by Step Solution

1. Step 1: Write the proportion equation
   2,123.22 : 3,181.89 = 805.62 : x
2. Step 2: Convert to fraction form
   2,123.22/3,181.89 = 805.62/x
3. Step 3: Cross multiply
   2,123.22x = 3,181.89 × 805.62
4. Step 4: Simplify right side
   2,123.22x = 2,563,409.17
5. Step 5: Solve for x
   x = 2,563,409.17/2,123.22
6. Step 6: Final answer
   x = 1,207.32