Finding the Fourth Proportional to 15,196.82, 20,973.58 and 8,909.78

Step by Step Solution

1. Step 1: Write the proportion equation
   15,196.82 : 20,973.58 = 8,909.78 : x
2. Step 2: Convert to fraction form
   15,196.82/20,973.58 = 8,909.78/x
3. Step 3: Cross multiply
   15,196.82x = 20,973.58 × 8,909.78
4. Step 4: Simplify right side
   15,196.82x = 186,869,983.61
5. Step 5: Solve for x
   x = 186,869,983.61/15,196.82
6. Step 6: Final answer
   x = 12,296.65