Finding the Fourth Proportional to 7,002.21, 9,662.72 and 4,019.12

Step by Step Solution

1. Step 1: Write the proportion equation
   7,002.21 : 9,662.72 = 4,019.12 : x
2. Step 2: Convert to fraction form
   7,002.21/9,662.72 = 4,019.12/x
3. Step 3: Cross multiply
   7,002.21x = 9,662.72 × 4,019.12
4. Step 4: Simplify right side
   7,002.21x = 38,835,562.80
5. Step 5: Solve for x
   x = 38,835,562.80/7,002.21
6. Step 6: Final answer
   x = 5,546.19