Finding the Fourth Proportional to 2,113.67, 3,169.89 and 814.83

Step by Step Solution

1. Step 1: Write the proportion equation
   2,113.67 : 3,169.89 = 814.83 : x
2. Step 2: Convert to fraction form
   2,113.67/3,169.89 = 814.83/x
3. Step 3: Cross multiply
   2,113.67x = 3,169.89 × 814.83
4. Step 4: Simplify right side
   2,113.67x = 2,582,917.39
5. Step 5: Solve for x
   x = 2,582,917.39/2,113.67
6. Step 6: Final answer
   x = 1,222.01