Finding the Fourth Proportional to 17,658.72, 26,487.72 and 7,128.46

Step by Step Solution

1. Step 1: Write the proportion equation
   17,658.72 : 26,487.72 = 7,128.46 : x
2. Step 2: Convert to fraction form
   17,658.72/26,487.72 = 7,128.46/x
3. Step 3: Cross multiply
   17,658.72x = 26,487.72 × 7,128.46
4. Step 4: Simplify right side
   17,658.72x = 188,816,652.51
5. Step 5: Solve for x
   x = 188,816,652.51/17,658.72
6. Step 6: Final answer
   x = 10,692.54