Finding the Fourth Proportional to 39,426.89, 59,143.16 and 12,406.91

Step by Step Solution

1. Step 1: Write the proportion equation
   39,426.89 : 59,143.16 = 12,406.91 : x
2. Step 2: Convert to fraction form
   39,426.89/59,143.16 = 12,406.91/x
3. Step 3: Cross multiply
   39,426.89x = 59,143.16 × 12,406.91
4. Step 4: Simplify right side
   39,426.89x = 733,783,598.54
5. Step 5: Solve for x
   x = 733,783,598.54/39,426.89
6. Step 6: Final answer
   x = 18,611.25