Finding the Fourth Proportional to 2,061.29, 2,844.13 and 1,221.57

Step by Step Solution

1. Step 1: Write the proportion equation
   2,061.29 : 2,844.13 = 1,221.57 : x
2. Step 2: Convert to fraction form
   2,061.29/2,844.13 = 1,221.57/x
3. Step 3: Cross multiply
   2,061.29x = 2,844.13 × 1,221.57
4. Step 4: Simplify right side
   2,061.29x = 3,474,297.78
5. Step 5: Solve for x
   x = 3,474,297.78/2,061.29
6. Step 6: Final answer
   x = 1,685.50