Finding the Fourth Proportional to 2,112.05, 3,168.68 and 651.42

Step by Step Solution

1. Step 1: Write the proportion equation
   2,112.05 : 3,168.68 = 651.42 : x
2. Step 2: Convert to fraction form
   2,112.05/3,168.68 = 651.42/x
3. Step 3: Cross multiply
   2,112.05x = 3,168.68 × 651.42
4. Step 4: Simplify right side
   2,112.05x = 2,064,141.53
5. Step 5: Solve for x
   x = 2,064,141.53/2,112.05
6. Step 6: Final answer
   x = 977.32