Finding the Fourth Proportional to 2,200.74, 3,300.21 and 814.17

Step by Step Solution

1. Step 1: Write the proportion equation
   2,200.74 : 3,300.21 = 814.17 : x
2. Step 2: Convert to fraction form
   2,200.74/3,300.21 = 814.17/x
3. Step 3: Cross multiply
   2,200.74x = 3,300.21 × 814.17
4. Step 4: Simplify right side
   2,200.74x = 2,686,931.98
5. Step 5: Solve for x
   x = 2,686,931.98/2,200.74
6. Step 6: Final answer
   x = 1,220.92