Finding the Fourth Proportional to 12,936.90, 17,859.72 and 8,710.19

Step by Step Solution

1. Step 1: Write the proportion equation
   12,936.90 : 17,859.72 = 8,710.19 : x
2. Step 2: Convert to fraction form
   12,936.90/17,859.72 = 8,710.19/x
3. Step 3: Cross multiply
   12,936.90x = 17,859.72 × 8,710.19
4. Step 4: Simplify right side
   12,936.90x = 155,561,465.25
5. Step 5: Solve for x
   x = 155,561,465.25/12,936.90
6. Step 6: Final answer
   x = 12,024.63