Finding the Fourth Proportional to 12,468.72, 17,207.20 and 7,164.60

Step by Step Solution

1. Step 1: Write the proportion equation
   12,468.72 : 17,207.20 = 7,164.60 : x
2. Step 2: Convert to fraction form
   12,468.72/17,207.20 = 7,164.60/x
3. Step 3: Cross multiply
   12,468.72x = 17,207.20 × 7,164.60
4. Step 4: Simplify right side
   12,468.72x = 123,282,705.12
5. Step 5: Solve for x
   x = 123,282,705.12/12,468.72
6. Step 6: Final answer
   x = 9,887.36