Finding the Fourth Proportional to 2,111.74, 3,168.06 and 651

Step by Step Solution

1. Step 1: Write the proportion equation
   2,111.74 : 3,168.06 = 651 : x
2. Step 2: Convert to fraction form
   2,111.74/3,168.06 = 651/x
3. Step 3: Cross multiply
   2,111.74x = 3,168.06 × 651
4. Step 4: Simplify right side
   2,111.74x = 2,062,407.06
5. Step 5: Solve for x
   x = 2,062,407.06/2,111.74
6. Step 6: Final answer
   x = 976.64