Finding the Fourth Proportional to 13,906.76, 19,191.60 and 7,618.72

Step by Step Solution

1. Step 1: Write the proportion equation
   13,906.76 : 19,191.60 = 7,618.72 : x
2. Step 2: Convert to fraction form
   13,906.76/19,191.60 = 7,618.72/x
3. Step 3: Cross multiply
   13,906.76x = 19,191.60 × 7,618.72
4. Step 4: Simplify right side
   13,906.76x = 146,215,426.75
5. Step 5: Solve for x
   x = 146,215,426.75/13,906.76
6. Step 6: Final answer
   x = 10,513.98