Finding the Fourth Proportional to 31,178.72, 46,790.63 and 12,463.98

Step by Step Solution

1. Step 1: Write the proportion equation
   31,178.72 : 46,790.63 = 12,463.98 : x
2. Step 2: Convert to fraction form
   31,178.72/46,790.63 = 12,463.98/x
3. Step 3: Cross multiply
   31,178.72x = 46,790.63 × 12,463.98
4. Step 4: Simplify right side
   31,178.72x = 583,197,375.92
5. Step 5: Solve for x
   x = 583,197,375.92/31,178.72
6. Step 6: Final answer
   x = 18,704.98