Finding the Fourth Proportional to 15,805.83, 21,811.89 and 8,732.25

Step by Step Solution

1. Step 1: Write the proportion equation
   15,805.83 : 21,811.89 = 8,732.25 : x
2. Step 2: Convert to fraction form
   15,805.83/21,811.89 = 8,732.25/x
3. Step 3: Cross multiply
   15,805.83x = 21,811.89 × 8,732.25
4. Step 4: Simplify right side
   15,805.83x = 190,466,876.45
5. Step 5: Solve for x
   x = 190,466,876.45/15,805.83
6. Step 6: Final answer
   x = 12,050.42