Finding the Fourth Proportional to 21,016.47, 31,523.49 and 7,698.45

Step by Step Solution

1. Step 1: Write the proportion equation
   21,016.47 : 31,523.49 = 7,698.45 : x
2. Step 2: Convert to fraction form
   21,016.47/31,523.49 = 7,698.45/x
3. Step 3: Cross multiply
   21,016.47x = 31,523.49 × 7,698.45
4. Step 4: Simplify right side
   21,016.47x = 242,682,011.59
5. Step 5: Solve for x
   x = 242,682,011.59/21,016.47
6. Step 6: Final answer
   x = 11,547.23