Finding the Fourth Proportional to 12,622.48, 18,919.56 and 4,294.72

Step by Step Solution

1. Step 1: Write the proportion equation
   12,622.48 : 18,919.56 = 4,294.72 : x
2. Step 2: Convert to fraction form
   12,622.48/18,919.56 = 4,294.72/x
3. Step 3: Cross multiply
   12,622.48x = 18,919.56 × 4,294.72
4. Step 4: Simplify right side
   12,622.48x = 81,254,212.72
5. Step 5: Solve for x
   x = 81,254,212.72/12,622.48
6. Step 6: Final answer
   x = 6,437.26