Finding the Fourth Proportional to 8,789.28, 12,129.22 and 4,810.42

Step by Step Solution

1. Step 1: Write the proportion equation
   8,789.28 : 12,129.22 = 4,810.42 : x
2. Step 2: Convert to fraction form
   8,789.28/12,129.22 = 4,810.42/x
3. Step 3: Cross multiply
   8,789.28x = 12,129.22 × 4,810.42
4. Step 4: Simplify right side
   8,789.28x = 58,346,642.47
5. Step 5: Solve for x
   x = 58,346,642.47/8,789.28
6. Step 6: Final answer
   x = 6,638.39