Finding the Fourth Proportional to 13,906.24, 19,190.64 and 7,618.72

Step by Step Solution

1. Step 1: Write the proportion equation
   13,906.24 : 19,190.64 = 7,618.72 : x
2. Step 2: Convert to fraction form
   13,906.24/19,190.64 = 7,618.72/x
3. Step 3: Cross multiply
   13,906.24x = 19,190.64 × 7,618.72
4. Step 4: Simplify right side
   13,906.24x = 146,208,112.78
5. Step 5: Solve for x
   x = 146,208,112.78/13,906.24
6. Step 6: Final answer
   x = 10,513.85