Finding the Fourth Proportional to 2,113.48, 3,169.38 and 814.12

Step by Step Solution

1. Step 1: Write the proportion equation
   2,113.48 : 3,169.38 = 814.12 : x
2. Step 2: Convert to fraction form
   2,113.48/3,169.38 = 814.12/x
3. Step 3: Cross multiply
   2,113.48x = 3,169.38 × 814.12
4. Step 4: Simplify right side
   2,113.48x = 2,580,255.65
5. Step 5: Solve for x
   x = 2,580,255.65/2,113.48
6. Step 6: Final answer
   x = 1,220.86