Finding the Fourth Proportional to 9,966.69, 14,949.43 and 4,123.15

Step by Step Solution

1. Step 1: Write the proportion equation
   9,966.69 : 14,949.43 = 4,123.15 : x
2. Step 2: Convert to fraction form
   9,966.69/14,949.43 = 4,123.15/x
3. Step 3: Cross multiply
   9,966.69x = 14,949.43 × 4,123.15
4. Step 4: Simplify right side
   9,966.69x = 61,638,694.62
5. Step 5: Solve for x
   x = 61,638,694.62/9,966.69
6. Step 6: Final answer
   x = 6,184.47