Finding the Fourth Proportional to 16,599.90, 22,910.94 and 9,429.78

Step by Step Solution

1. Step 1: Write the proportion equation
   16,599.90 : 22,910.94 = 9,429.78 : x
2. Step 2: Convert to fraction form
   16,599.90/22,910.94 = 9,429.78/x
3. Step 3: Cross multiply
   16,599.90x = 22,910.94 × 9,429.78
4. Step 4: Simplify right side
   16,599.90x = 216,045,123.79
5. Step 5: Solve for x
   x = 216,045,123.79/16,599.90
6. Step 6: Final answer
   x = 13,014.84