Finding the Fourth Proportional to 2,111.02, 3,166.02 and 649.78

Step by Step Solution

1. Step 1: Write the proportion equation
   2,111.02 : 3,166.02 = 649.78 : x
2. Step 2: Convert to fraction form
   2,111.02/3,166.02 = 649.78/x
3. Step 3: Cross multiply
   2,111.02x = 3,166.02 × 649.78
4. Step 4: Simplify right side
   2,111.02x = 2,057,216.48
5. Step 5: Solve for x
   x = 2,057,216.48/2,111.02
6. Step 6: Final answer
   x = 974.51