Finding the Fourth Proportional to 2,112.89, 3,168.72 and 651.24

Step by Step Solution

1. Step 1: Write the proportion equation
   2,112.89 : 3,168.72 = 651.24 : x
2. Step 2: Convert to fraction form
   2,112.89/3,168.72 = 651.24/x
3. Step 3: Cross multiply
   2,112.89x = 3,168.72 × 651.24
4. Step 4: Simplify right side
   2,112.89x = 2,063,597.21
5. Step 5: Solve for x
   x = 2,063,597.21/2,112.89
6. Step 6: Final answer
   x = 976.67