Finding the Fourth Proportional to 2,017.86, 3,026.07 and 630.78

Step by Step Solution

1. Step 1: Write the proportion equation
   2,017.86 : 3,026.07 = 630.78 : x
2. Step 2: Convert to fraction form
   2,017.86/3,026.07 = 630.78/x
3. Step 3: Cross multiply
   2,017.86x = 3,026.07 × 630.78
4. Step 4: Simplify right side
   2,017.86x = 1,908,784.43
5. Step 5: Solve for x
   x = 1,908,784.43/2,017.86
6. Step 6: Final answer
   x = 945.94