Finding the Fourth Proportional to 2,021.74, 3,030.38 and 1,857.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,021.74 : 3,030.38 = 1,857.72 : x
2. Step 2: Convert to fraction form
   2,021.74/3,030.38 = 1,857.72/x
3. Step 3: Cross multiply
   2,021.74x = 3,030.38 × 1,857.72
4. Step 4: Simplify right side
   2,021.74x = 5,629,597.53
5. Step 5: Solve for x
   x = 5,629,597.53/2,021.74
6. Step 6: Final answer
   x = 2,784.53