Finding the Fourth Proportional to 12,933.15, 17,854.88 and 8,690.37

Step by Step Solution

1. Step 1: Write the proportion equation
   12,933.15 : 17,854.88 = 8,690.37 : x
2. Step 2: Convert to fraction form
   12,933.15/17,854.88 = 8,690.37/x
3. Step 3: Cross multiply
   12,933.15x = 17,854.88 × 8,690.37
4. Step 4: Simplify right side
   12,933.15x = 155,165,513.51
5. Step 5: Solve for x
   x = 155,165,513.51/12,933.15
6. Step 6: Final answer
   x = 11,997.50