Finding the Fourth Proportional to 13,659.29, 18,850.17 and 7,691.18

Step by Step Solution

1. Step 1: Write the proportion equation
   13,659.29 : 18,850.17 = 7,691.18 : x
2. Step 2: Convert to fraction form
   13,659.29/18,850.17 = 7,691.18/x
3. Step 3: Cross multiply
   13,659.29x = 18,850.17 × 7,691.18
4. Step 4: Simplify right side
   13,659.29x = 144,979,956.25
5. Step 5: Solve for x
   x = 144,979,956.25/13,659.29
6. Step 6: Final answer
   x = 10,614.02