Finding the Fourth Proportional to 7,222.05, 10,820.31 and 5,020.47

Step by Step Solution

1. Step 1: Write the proportion equation
   7,222.05 : 10,820.31 = 5,020.47 : x
2. Step 2: Convert to fraction form
   7,222.05/10,820.31 = 5,020.47/x
3. Step 3: Cross multiply
   7,222.05x = 10,820.31 × 5,020.47
4. Step 4: Simplify right side
   7,222.05x = 54,323,041.75
5. Step 5: Solve for x
   x = 54,323,041.75/7,222.05
6. Step 6: Final answer
   x = 7,521.83