Finding the Fourth Proportional to 2,091.76, 3,137.94 and 631.02

Step by Step Solution

1. Step 1: Write the proportion equation
   2,091.76 : 3,137.94 = 631.02 : x
2. Step 2: Convert to fraction form
   2,091.76/3,137.94 = 631.02/x
3. Step 3: Cross multiply
   2,091.76x = 3,137.94 × 631.02
4. Step 4: Simplify right side
   2,091.76x = 1,980,114.67
5. Step 5: Solve for x
   x = 1,980,114.67/2,091.76
6. Step 6: Final answer
   x = 946.63