Finding the Fourth Proportional to 21,100.56, 31,650.56 and 6,309.60

Step by Step Solution

1. Step 1: Write the proportion equation
   21,100.56 : 31,650.56 = 6,309.60 : x
2. Step 2: Convert to fraction form
   21,100.56/31,650.56 = 6,309.60/x
3. Step 3: Cross multiply
   21,100.56x = 31,650.56 × 6,309.60
4. Step 4: Simplify right side
   21,100.56x = 199,702,373.38
5. Step 5: Solve for x
   x = 199,702,373.38/21,100.56
6. Step 6: Final answer
   x = 9,464.32