Finding the Fourth Proportional to 8,789.38, 12,129.33 and 4,810.49

Step by Step Solution

1. Step 1: Write the proportion equation
   8,789.38 : 12,129.33 = 4,810.49 : x
2. Step 2: Convert to fraction form
   8,789.38/12,129.33 = 4,810.49/x
3. Step 3: Cross multiply
   8,789.38x = 12,129.33 × 4,810.49
4. Step 4: Simplify right side
   8,789.38x = 58,347,996.49
5. Step 5: Solve for x
   x = 58,347,996.49/8,789.38
6. Step 6: Final answer
   x = 6,638.47