Finding the Fourth Proportional to 12,643.51, 17,454.60 and 9,236.69

Step by Step Solution

1. Step 1: Write the proportion equation
   12,643.51 : 17,454.60 = 9,236.69 : x
2. Step 2: Convert to fraction form
   12,643.51/17,454.60 = 9,236.69/x
3. Step 3: Cross multiply
   12,643.51x = 17,454.60 × 9,236.69
4. Step 4: Simplify right side
   12,643.51x = 161,222,772.91
5. Step 5: Solve for x
   x = 161,222,772.91/12,643.51
6. Step 6: Final answer
   x = 12,751.43