Finding the Fourth Proportional to 13,003.38, 19,490.76 and 8,308.62

Step by Step Solution

1. Step 1: Write the proportion equation
   13,003.38 : 19,490.76 = 8,308.62 : x
2. Step 2: Convert to fraction form
   13,003.38/19,490.76 = 8,308.62/x
3. Step 3: Cross multiply
   13,003.38x = 19,490.76 × 8,308.62
4. Step 4: Simplify right side
   13,003.38x = 161,941,318.35
5. Step 5: Solve for x
   x = 161,941,318.35/13,003.38
6. Step 6: Final answer
   x = 12,453.79