Finding the Fourth Proportional to 2,111.79, 3,168.30 and 651.18

Step by Step Solution

1. Step 1: Write the proportion equation
   2,111.79 : 3,168.30 = 651.18 : x
2. Step 2: Convert to fraction form
   2,111.79/3,168.30 = 651.18/x
3. Step 3: Cross multiply
   2,111.79x = 3,168.30 × 651.18
4. Step 4: Simplify right side
   2,111.79x = 2,063,133.59
5. Step 5: Solve for x
   x = 2,063,133.59/2,111.79
6. Step 6: Final answer
   x = 976.96