Finding the Fourth Proportional to 2,061.78, 3,090.57 and 1,020.22

Step by Step Solution

1. Step 1: Write the proportion equation
   2,061.78 : 3,090.57 = 1,020.22 : x
2. Step 2: Convert to fraction form
   2,061.78/3,090.57 = 1,020.22/x
3. Step 3: Cross multiply
   2,061.78x = 3,090.57 × 1,020.22
4. Step 4: Simplify right side
   2,061.78x = 3,153,061.33
5. Step 5: Solve for x
   x = 3,153,061.33/2,061.78
6. Step 6: Final answer
   x = 1,529.29