Finding the Fourth Proportional to 12,488.10, 17,209.87 and 8,945.16

Step by Step Solution

1. Step 1: Write the proportion equation
   12,488.10 : 17,209.87 = 8,945.16 : x
2. Step 2: Convert to fraction form
   12,488.10/17,209.87 = 8,945.16/x
3. Step 3: Cross multiply
   12,488.10x = 17,209.87 × 8,945.16
4. Step 4: Simplify right side
   12,488.10x = 153,945,040.73
5. Step 5: Solve for x
   x = 153,945,040.73/12,488.10
6. Step 6: Final answer
   x = 12,327.34