Finding the Fourth Proportional to 13,908.19, 19,193.61 and 7,620.57

Step by Step Solution

1. Step 1: Write the proportion equation
   13,908.19 : 19,193.61 = 7,620.57 : x
2. Step 2: Convert to fraction form
   13,908.19/19,193.61 = 7,620.57/x
3. Step 3: Cross multiply
   13,908.19x = 19,193.61 × 7,620.57
4. Step 4: Simplify right side
   13,908.19x = 146,266,248.56
5. Step 5: Solve for x
   x = 146,266,248.56/13,908.19
6. Step 6: Final answer
   x = 10,516.56