Finding the Fourth Proportional to 12,919.50, 17,826.15 and 7,612.38

Step by Step Solution

1. Step 1: Write the proportion equation
   12,919.50 : 17,826.15 = 7,612.38 : x
2. Step 2: Convert to fraction form
   12,919.50/17,826.15 = 7,612.38/x
3. Step 3: Cross multiply
   12,919.50x = 17,826.15 × 7,612.38
4. Step 4: Simplify right side
   12,919.50x = 135,699,427.74
5. Step 5: Solve for x
   x = 135,699,427.74/12,919.50
6. Step 6: Final answer
   x = 10,503.46