Finding the Fourth Proportional to 15,898.32, 21,940.72 and 8,824.80

Step by Step Solution

1. Step 1: Write the proportion equation
   15,898.32 : 21,940.72 = 8,824.80 : x
2. Step 2: Convert to fraction form
   15,898.32/21,940.72 = 8,824.80/x
3. Step 3: Cross multiply
   15,898.32x = 21,940.72 × 8,824.80
4. Step 4: Simplify right side
   15,898.32x = 193,622,465.86
5. Step 5: Solve for x
   x = 193,622,465.86/15,898.32
6. Step 6: Final answer
   x = 12,178.80