Finding the Fourth Proportional to 40,516.88, 60,785.59 and 12,438.37

Step by Step Solution

1. Step 1: Write the proportion equation
   40,516.88 : 60,785.59 = 12,438.37 : x
2. Step 2: Convert to fraction form
   40,516.88/60,785.59 = 12,438.37/x
3. Step 3: Cross multiply
   40,516.88x = 60,785.59 × 12,438.37
4. Step 4: Simplify right side
   40,516.88x = 756,073,476.03
5. Step 5: Solve for x
   x = 756,073,476.03/40,516.88
6. Step 6: Final answer
   x = 18,660.70