Finding the Fourth Proportional to 21,213.18, 31,820.37 and 5,630.82

Step by Step Solution

1. Step 1: Write the proportion equation
   21,213.18 : 31,820.37 = 5,630.82 : x
2. Step 2: Convert to fraction form
   21,213.18/31,820.37 = 5,630.82/x
3. Step 3: Cross multiply
   21,213.18x = 31,820.37 × 5,630.82
4. Step 4: Simplify right side
   21,213.18x = 179,174,775.80
5. Step 5: Solve for x
   x = 179,174,775.80/21,213.18
6. Step 6: Final answer
   x = 8,446.39