Finding the Fourth Proportional to 21,300.54, 31,951.89 and 6,509.94

Step by Step Solution

1. Step 1: Write the proportion equation
   21,300.54 : 31,951.89 = 6,509.94 : x
2. Step 2: Convert to fraction form
   21,300.54/31,951.89 = 6,509.94/x
3. Step 3: Cross multiply
   21,300.54x = 31,951.89 × 6,509.94
4. Step 4: Simplify right side
   21,300.54x = 208,004,886.79
5. Step 5: Solve for x
   x = 208,004,886.79/21,300.54
6. Step 6: Final answer
   x = 9,765.24