Finding the Fourth Proportional to 13,404.28, 18,485.78 and 8,368.96

Step by Step Solution

1. Step 1: Write the proportion equation
   13,404.28 : 18,485.78 = 8,368.96 : x
2. Step 2: Convert to fraction form
   13,404.28/18,485.78 = 8,368.96/x
3. Step 3: Cross multiply
   13,404.28x = 18,485.78 × 8,368.96
4. Step 4: Simplify right side
   13,404.28x = 154,706,753.39
5. Step 5: Solve for x
   x = 154,706,753.39/13,404.28
6. Step 6: Final answer
   x = 11,541.59