Finding the Fourth Proportional to 5,632.72, 8,443.21 and 2,120.31

Step by Step Solution

1. Step 1: Write the proportion equation
   5,632.72 : 8,443.21 = 2,120.31 : x
2. Step 2: Convert to fraction form
   5,632.72/8,443.21 = 2,120.31/x
3. Step 3: Cross multiply
   5,632.72x = 8,443.21 × 2,120.31
4. Step 4: Simplify right side
   5,632.72x = 17,902,222.60
5. Step 5: Solve for x
   x = 17,902,222.60/5,632.72
6. Step 6: Final answer
   x = 3,178.26