Finding the Fourth Proportional to 13,908.38, 19,193.56 and 7,620.89

Step by Step Solution

1. Step 1: Write the proportion equation
   13,908.38 : 19,193.56 = 7,620.89 : x
2. Step 2: Convert to fraction form
   13,908.38/19,193.56 = 7,620.89/x
3. Step 3: Cross multiply
   13,908.38x = 19,193.56 × 7,620.89
4. Step 4: Simplify right side
   13,908.38x = 146,271,894.45
5. Step 5: Solve for x
   x = 146,271,894.45/13,908.38
6. Step 6: Final answer
   x = 10,516.82