Finding the Fourth Proportional to 10,669.21, 14,691.23 and 8,423.89

Step by Step Solution

1. Step 1: Write the proportion equation
   10,669.21 : 14,691.23 = 8,423.89 : x
2. Step 2: Convert to fraction form
   10,669.21/14,691.23 = 8,423.89/x
3. Step 3: Cross multiply
   10,669.21x = 14,691.23 × 8,423.89
4. Step 4: Simplify right side
   10,669.21x = 123,757,305.48
5. Step 5: Solve for x
   x = 123,757,305.48/10,669.21
6. Step 6: Final answer
   x = 11,599.48