Finding the Fourth Proportional to 12,435.50, 18,659.72 and 5,508.38

Step by Step Solution

1. Step 1: Write the proportion equation
   12,435.50 : 18,659.72 = 5,508.38 : x
2. Step 2: Convert to fraction form
   12,435.50/18,659.72 = 5,508.38/x
3. Step 3: Cross multiply
   12,435.50x = 18,659.72 × 5,508.38
4. Step 4: Simplify right side
   12,435.50x = 102,784,748.93
5. Step 5: Solve for x
   x = 102,784,748.93/12,435.50
6. Step 6: Final answer
   x = 8,265.43