Finding the Fourth Proportional to 12,659.24, 18,892.78 and 12,364.40

Step by Step Solution

1. Step 1: Write the proportion equation
   12,659.24 : 18,892.78 = 12,364.40 : x
2. Step 2: Convert to fraction form
   12,659.24/18,892.78 = 12,364.40/x
3. Step 3: Cross multiply
   12,659.24x = 18,892.78 × 12,364.40
4. Step 4: Simplify right side
   12,659.24x = 233,597,889.03
5. Step 5: Solve for x
   x = 233,597,889.03/12,659.24
6. Step 6: Final answer
   x = 18,452.76