Finding the Fourth Proportional to 10,147.43, 15,222.59 and 3,128.03

Step by Step Solution

1. Step 1: Write the proportion equation
   10,147.43 : 15,222.59 = 3,128.03 : x
2. Step 2: Convert to fraction form
   10,147.43/15,222.59 = 3,128.03/x
3. Step 3: Cross multiply
   10,147.43x = 15,222.59 × 3,128.03
4. Step 4: Simplify right side
   10,147.43x = 47,616,702.56
5. Step 5: Solve for x
   x = 47,616,702.56/10,147.43
6. Step 6: Final answer
   x = 4,692.49