Finding the Fourth Proportional to 13,906.48, 19,190.68 and 7,618.81

Step by Step Solution

1. Step 1: Write the proportion equation
   13,906.48 : 19,190.68 = 7,618.81 : x
2. Step 2: Convert to fraction form
   13,906.48/19,190.68 = 7,618.81/x
3. Step 3: Cross multiply
   13,906.48x = 19,190.68 × 7,618.81
4. Step 4: Simplify right side
   13,906.48x = 146,210,144.69
5. Step 5: Solve for x
   x = 146,210,144.69/13,906.48
6. Step 6: Final answer
   x = 10,513.81