Finding the Fourth Proportional to 9,041.20, 12,478.17 and 5,212.10

Step by Step Solution

1. Step 1: Write the proportion equation
   9,041.20 : 12,478.17 = 5,212.10 : x
2. Step 2: Convert to fraction form
   9,041.20/12,478.17 = 5,212.10/x
3. Step 3: Cross multiply
   9,041.20x = 12,478.17 × 5,212.10
4. Step 4: Simplify right side
   9,041.20x = 65,037,469.86
5. Step 5: Solve for x
   x = 65,037,469.86/9,041.20
6. Step 6: Final answer
   x = 7,193.46