Finding the Fourth Proportional to 2,020.78, 3,030.24 and 1,188.24

Step by Step Solution

1. Step 1: Write the proportion equation
   2,020.78 : 3,030.24 = 1,188.24 : x
2. Step 2: Convert to fraction form
   2,020.78/3,030.24 = 1,188.24/x
3. Step 3: Cross multiply
   2,020.78x = 3,030.24 × 1,188.24
4. Step 4: Simplify right side
   2,020.78x = 3,600,652.38
5. Step 5: Solve for x
   x = 3,600,652.38/2,020.78
6. Step 6: Final answer
   x = 1,781.81