Finding the Fourth Proportional to 12,488.58, 17,210.52 and 8,945.64

Step by Step Solution

1. Step 1: Write the proportion equation
   12,488.58 : 17,210.52 = 8,945.64 : x
2. Step 2: Convert to fraction form
   12,488.58/17,210.52 = 8,945.64/x
3. Step 3: Cross multiply
   12,488.58x = 17,210.52 × 8,945.64
4. Step 4: Simplify right side
   12,488.58x = 153,959,116.13
5. Step 5: Solve for x
   x = 153,959,116.13/12,488.58
6. Step 6: Final answer
   x = 12,327.99