Finding the Fourth Proportional to 2,091.55, 3,137.33 and 631.12

Step by Step Solution

1. Step 1: Write the proportion equation
   2,091.55 : 3,137.33 = 631.12 : x
2. Step 2: Convert to fraction form
   2,091.55/3,137.33 = 631.12/x
3. Step 3: Cross multiply
   2,091.55x = 3,137.33 × 631.12
4. Step 4: Simplify right side
   2,091.55x = 1,980,031.71
5. Step 5: Solve for x
   x = 1,980,031.71/2,091.55
6. Step 6: Final answer
   x = 946.68