Finding the Fourth Proportional to 21,300.99, 31,951.50 and 9,600.54

Step by Step Solution

1. Step 1: Write the proportion equation
   21,300.99 : 31,951.50 = 9,600.54 : x
2. Step 2: Convert to fraction form
   21,300.99/31,951.50 = 9,600.54/x
3. Step 3: Cross multiply
   21,300.99x = 31,951.50 × 9,600.54
4. Step 4: Simplify right side
   21,300.99x = 306,751,653.81
5. Step 5: Solve for x
   x = 306,751,653.81/21,300.99
6. Step 6: Final answer
   x = 14,400.82