Finding the Fourth Proportional to 12,655.50, 17,465.40 and 7,066.50

Step by Step Solution

1. Step 1: Write the proportion equation
   12,655.50 : 17,465.40 = 7,066.50 : x
2. Step 2: Convert to fraction form
   12,655.50/17,465.40 = 7,066.50/x
3. Step 3: Cross multiply
   12,655.50x = 17,465.40 × 7,066.50
4. Step 4: Simplify right side
   12,655.50x = 123,419,249.10
5. Step 5: Solve for x
   x = 123,419,249.10/12,655.50
6. Step 6: Final answer
   x = 9,752.22