Finding the Fourth Proportional to 12,200.28, 16,836.24 and 7,418.64

Step by Step Solution

1. Step 1: Write the proportion equation
   12,200.28 : 16,836.24 = 7,418.64 : x
2. Step 2: Convert to fraction form
   12,200.28/16,836.24 = 7,418.64/x
3. Step 3: Cross multiply
   12,200.28x = 16,836.24 × 7,418.64
4. Step 4: Simplify right side
   12,200.28x = 124,902,003.51
5. Step 5: Solve for x
   x = 124,902,003.51/12,200.28
6. Step 6: Final answer
   x = 10,237.63