Finding the Fourth Proportional to 13,066.96, 18,033.72 and 7,691.50

Step by Step Solution

1. Step 1: Write the proportion equation
   13,066.96 : 18,033.72 = 7,691.50 : x
2. Step 2: Convert to fraction form
   13,066.96/18,033.72 = 7,691.50/x
3. Step 3: Cross multiply
   13,066.96x = 18,033.72 × 7,691.50
4. Step 4: Simplify right side
   13,066.96x = 138,706,357.38
5. Step 5: Solve for x
   x = 138,706,357.38/13,066.96
6. Step 6: Final answer
   x = 10,615.04