Finding the Fourth Proportional to 2,111.69, 3,166.80 and 630.50

Step by Step Solution

1. Step 1: Write the proportion equation
   2,111.69 : 3,166.80 = 630.50 : x
2. Step 2: Convert to fraction form
   2,111.69/3,166.80 = 630.50/x
3. Step 3: Cross multiply
   2,111.69x = 3,166.80 × 630.50
4. Step 4: Simplify right side
   2,111.69x = 1,996,667.40
5. Step 5: Solve for x
   x = 1,996,667.40/2,111.69
6. Step 6: Final answer
   x = 945.53