Finding the Fourth Proportional to 7,022.31, 10,532.58 and 4,390.05

Step by Step Solution

1. Step 1: Write the proportion equation
   7,022.31 : 10,532.58 = 4,390.05 : x
2. Step 2: Convert to fraction form
   7,022.31/10,532.58 = 4,390.05/x
3. Step 3: Cross multiply
   7,022.31x = 10,532.58 × 4,390.05
4. Step 4: Simplify right side
   7,022.31x = 46,238,552.83
5. Step 5: Solve for x
   x = 46,238,552.83/7,022.31
6. Step 6: Final answer
   x = 6,584.52