Finding the Fourth Proportional to 7,003.61, 9,658.47 and 5,112.20

Step by Step Solution

1. Step 1: Write the proportion equation
   7,003.61 : 9,658.47 = 5,112.20 : x
2. Step 2: Convert to fraction form
   7,003.61/9,658.47 = 5,112.20/x
3. Step 3: Cross multiply
   7,003.61x = 9,658.47 × 5,112.20
4. Step 4: Simplify right side
   7,003.61x = 49,375,982.04
5. Step 5: Solve for x
   x = 49,375,982.04/7,003.61
6. Step 6: Final answer
   x = 7,050.08