Finding the Fourth Proportional to 31,144.46, 46,687.90 and 12,419.94

Step by Step Solution

1. Step 1: Write the proportion equation
   31,144.46 : 46,687.90 = 12,419.94 : x
2. Step 2: Convert to fraction form
   31,144.46/46,687.90 = 12,419.94/x
3. Step 3: Cross multiply
   31,144.46x = 46,687.90 × 12,419.94
4. Step 4: Simplify right side
   31,144.46x = 579,860,916.73
5. Step 5: Solve for x
   x = 579,860,916.73/31,144.46
6. Step 6: Final answer
   x = 18,618.43