Finding the Fourth Proportional to 2,113.02, 3,168.76 and 631.80

Step by Step Solution

1. Step 1: Write the proportion equation
   2,113.02 : 3,168.76 = 631.80 : x
2. Step 2: Convert to fraction form
   2,113.02/3,168.76 = 631.80/x
3. Step 3: Cross multiply
   2,113.02x = 3,168.76 × 631.80
4. Step 4: Simplify right side
   2,113.02x = 2,002,022.57
5. Step 5: Solve for x
   x = 2,002,022.57/2,113.02
6. Step 6: Final answer
   x = 947.47