Finding the Fourth Proportional to 21,200.28, 31,802.22 and 5,617.72

Step by Step Solution

1. Step 1: Write the proportion equation
   21,200.28 : 31,802.22 = 5,617.72 : x
2. Step 2: Convert to fraction form
   21,200.28/31,802.22 = 5,617.72/x
3. Step 3: Cross multiply
   21,200.28x = 31,802.22 × 5,617.72
4. Step 4: Simplify right side
   21,200.28x = 178,655,967.34
5. Step 5: Solve for x
   x = 178,655,967.34/21,200.28
6. Step 6: Final answer
   x = 8,427.06