Finding the Fourth Proportional to 2,200.82, 3,302.50 and 815.11

Step by Step Solution

1. Step 1: Write the proportion equation
   2,200.82 : 3,302.50 = 815.11 : x
2. Step 2: Convert to fraction form
   2,200.82/3,302.50 = 815.11/x
3. Step 3: Cross multiply
   2,200.82x = 3,302.50 × 815.11
4. Step 4: Simplify right side
   2,200.82x = 2,691,908.29
5. Step 5: Solve for x
   x = 2,691,908.29/2,200.82
6. Step 6: Final answer
   x = 1,223.14