Finding the Fourth Proportional to 13,906.05, 19,191.72 and 7,938.63

Step by Step Solution

1. Step 1: Write the proportion equation
   13,906.05 : 19,191.72 = 7,938.63 : x
2. Step 2: Convert to fraction form
   13,906.05/19,191.72 = 7,938.63/x
3. Step 3: Cross multiply
   13,906.05x = 19,191.72 × 7,938.63
4. Step 4: Simplify right side
   13,906.05x = 152,355,964.14
5. Step 5: Solve for x
   x = 152,355,964.14/13,906.05
6. Step 6: Final answer
   x = 10,956.09