Finding the Fourth Proportional to 12,776.83, 17,631.99 and 7,187.83

Step by Step Solution

1. Step 1: Write the proportion equation
   12,776.83 : 17,631.99 = 7,187.83 : x
2. Step 2: Convert to fraction form
   12,776.83/17,631.99 = 7,187.83/x
3. Step 3: Cross multiply
   12,776.83x = 17,631.99 × 7,187.83
4. Step 4: Simplify right side
   12,776.83x = 126,735,676.49
5. Step 5: Solve for x
   x = 126,735,676.49/12,776.83
6. Step 6: Final answer
   x = 9,919.18