Finding the Fourth Proportional to 17,662.49, 26,487.89 and 7,129.79

Step by Step Solution

1. Step 1: Write the proportion equation
   17,662.49 : 26,487.89 = 7,129.79 : x
2. Step 2: Convert to fraction form
   17,662.49/26,487.89 = 7,129.79/x
3. Step 3: Cross multiply
   17,662.49x = 26,487.89 × 7,129.79
4. Step 4: Simplify right side
   17,662.49x = 188,853,057.59
5. Step 5: Solve for x
   x = 188,853,057.59/17,662.49
6. Step 6: Final answer
   x = 10,692.32