Finding the Fourth Proportional to 31,122.95, 46,665.57 and 12,405.83

Step by Step Solution

1. Step 1: Write the proportion equation
   31,122.95 : 46,665.57 = 12,405.83 : x
2. Step 2: Convert to fraction form
   31,122.95/46,665.57 = 12,405.83/x
3. Step 3: Cross multiply
   31,122.95x = 46,665.57 × 12,405.83
4. Step 4: Simplify right side
   31,122.95x = 578,925,128.27
5. Step 5: Solve for x
   x = 578,925,128.27/31,122.95
6. Step 6: Final answer
   x = 18,601.23