Finding the Fourth Proportional to 2,018.50, 3,028.22 and 631.76

Step by Step Solution

1. Step 1: Write the proportion equation
   2,018.50 : 3,028.22 = 631.76 : x
2. Step 2: Convert to fraction form
   2,018.50/3,028.22 = 631.76/x
3. Step 3: Cross multiply
   2,018.50x = 3,028.22 × 631.76
4. Step 4: Simplify right side
   2,018.50x = 1,913,108.27
5. Step 5: Solve for x
   x = 1,913,108.27/2,018.50
6. Step 6: Final answer
   x = 947.79