Finding the Fourth Proportional to 2,091.42, 3,137.13 and 630.55

Step by Step Solution

1. Step 1: Write the proportion equation
   2,091.42 : 3,137.13 = 630.55 : x
2. Step 2: Convert to fraction form
   2,091.42/3,137.13 = 630.55/x
3. Step 3: Cross multiply
   2,091.42x = 3,137.13 × 630.55
4. Step 4: Simplify right side
   2,091.42x = 1,978,117.32
5. Step 5: Solve for x
   x = 1,978,117.32/2,091.42
6. Step 6: Final answer
   x = 945.83