Finding the Fourth Proportional to 9,039.20, 12,475.41 and 5,210.10

Step by Step Solution

1. Step 1: Write the proportion equation
   9,039.20 : 12,475.41 = 5,210.10 : x
2. Step 2: Convert to fraction form
   9,039.20/12,475.41 = 5,210.10/x
3. Step 3: Cross multiply
   9,039.20x = 12,475.41 × 5,210.10
4. Step 4: Simplify right side
   9,039.20x = 64,998,133.64
5. Step 5: Solve for x
   x = 64,998,133.64/9,039.20
6. Step 6: Final answer
   x = 7,190.70