Finding the Fourth Proportional to 16,236.78, 22,406.79 and 8,784.78

Step by Step Solution

1. Step 1: Write the proportion equation
   16,236.78 : 22,406.79 = 8,784.78 : x
2. Step 2: Convert to fraction form
   16,236.78/22,406.79 = 8,784.78/x
3. Step 3: Cross multiply
   16,236.78x = 22,406.79 × 8,784.78
4. Step 4: Simplify right side
   16,236.78x = 196,838,720.66
5. Step 5: Solve for x
   x = 196,838,720.66/16,236.78
6. Step 6: Final answer
   x = 12,123.01