Finding the Fourth Proportional to 16,977.32, 23,429.12 and 9,423.78

Step by Step Solution

1. Step 1: Write the proportion equation
   16,977.32 : 23,429.12 = 9,423.78 : x
2. Step 2: Convert to fraction form
   16,977.32/23,429.12 = 9,423.78/x
3. Step 3: Cross multiply
   16,977.32x = 23,429.12 × 9,423.78
4. Step 4: Simplify right side
   16,977.32x = 220,790,872.47
5. Step 5: Solve for x
   x = 220,790,872.47/16,977.32
6. Step 6: Final answer
   x = 13,005.05