Finding the Fourth Proportional to 15,705.91, 21,665.50 and 9,952.84

Step by Step Solution

1. Step 1: Write the proportion equation
   15,705.91 : 21,665.50 = 9,952.84 : x
2. Step 2: Convert to fraction form
   15,705.91/21,665.50 = 9,952.84/x
3. Step 3: Cross multiply
   15,705.91x = 21,665.50 × 9,952.84
4. Step 4: Simplify right side
   15,705.91x = 215,633,255.02
5. Step 5: Solve for x
   x = 215,633,255.02/15,705.91
6. Step 6: Final answer
   x = 13,729.43