Finding the Fourth Proportional to 12,099.38, 16,689.90 and 7,615.34

Step by Step Solution

1. Step 1: Write the proportion equation
   12,099.38 : 16,689.90 = 7,615.34 : x
2. Step 2: Convert to fraction form
   12,099.38/16,689.90 = 7,615.34/x
3. Step 3: Cross multiply
   12,099.38x = 16,689.90 × 7,615.34
4. Step 4: Simplify right side
   12,099.38x = 127,099,274.87
5. Step 5: Solve for x
   x = 127,099,274.87/12,099.38
6. Step 6: Final answer
   x = 10,504.61