Finding the Fourth Proportional to 2,113.30, 3,168.03 and 814.42

Step by Step Solution

1. Step 1: Write the proportion equation
   2,113.30 : 3,168.03 = 814.42 : x
2. Step 2: Convert to fraction form
   2,113.30/3,168.03 = 814.42/x
3. Step 3: Cross multiply
   2,113.30x = 3,168.03 × 814.42
4. Step 4: Simplify right side
   2,113.30x = 2,580,106.99
5. Step 5: Solve for x
   x = 2,580,106.99/2,113.30
6. Step 6: Final answer
   x = 1,220.89