Finding the Fourth Proportional to 15,735.25, 21,715.59 and 8,661.52

Step by Step Solution

1. Step 1: Write the proportion equation
   15,735.25 : 21,715.59 = 8,661.52 : x
2. Step 2: Convert to fraction form
   15,735.25/21,715.59 = 8,661.52/x
3. Step 3: Cross multiply
   15,735.25x = 21,715.59 × 8,661.52
4. Step 4: Simplify right side
   15,735.25x = 188,090,017.10
5. Step 5: Solve for x
   x = 188,090,017.10/15,735.25
6. Step 6: Final answer
   x = 11,953.42