Finding the Fourth Proportional to 10,147.43, 15,222.58 and 3,128.01

Step by Step Solution

1. Step 1: Write the proportion equation
   10,147.43 : 15,222.58 = 3,128.01 : x
2. Step 2: Convert to fraction form
   10,147.43/15,222.58 = 3,128.01/x
3. Step 3: Cross multiply
   10,147.43x = 15,222.58 × 3,128.01
4. Step 4: Simplify right side
   10,147.43x = 47,616,403.19
5. Step 5: Solve for x
   x = 47,616,403.19/10,147.43
6. Step 6: Final answer
   x = 4,692.46