Finding the Fourth Proportional to 13,404.05, 18,494.82 and 7,738.70

Step by Step Solution

1. Step 1: Write the proportion equation
   13,404.05 : 18,494.82 = 7,738.70 : x
2. Step 2: Convert to fraction form
   13,404.05/18,494.82 = 7,738.70/x
3. Step 3: Cross multiply
   13,404.05x = 18,494.82 × 7,738.70
4. Step 4: Simplify right side
   13,404.05x = 143,125,863.53
5. Step 5: Solve for x
   x = 143,125,863.53/13,404.05
6. Step 6: Final answer
   x = 10,677.81