Finding the Fourth Proportional to 12,422.58, 18,629.90 and 4,100.72

Step by Step Solution

1. Step 1: Write the proportion equation
   12,422.58 : 18,629.90 = 4,100.72 : x
2. Step 2: Convert to fraction form
   12,422.58/18,629.90 = 4,100.72/x
3. Step 3: Cross multiply
   12,422.58x = 18,629.90 × 4,100.72
4. Step 4: Simplify right side
   12,422.58x = 76,396,003.53
5. Step 5: Solve for x
   x = 76,396,003.53/12,422.58
6. Step 6: Final answer
   x = 6,149.77