Finding the Fourth Proportional to 13,146.94, 18,142.07 and 7,697.67

Step by Step Solution

1. Step 1: Write the proportion equation
   13,146.94 : 18,142.07 = 7,697.67 : x
2. Step 2: Convert to fraction form
   13,146.94/18,142.07 = 7,697.67/x
3. Step 3: Cross multiply
   13,146.94x = 18,142.07 × 7,697.67
4. Step 4: Simplify right side
   13,146.94x = 139,651,667.98
5. Step 5: Solve for x
   x = 139,651,667.98/13,146.94
6. Step 6: Final answer
   x = 10,622.37