Finding the Fourth Proportional to 31,766.61, 43,865.79 and 19,850.31

Step by Step Solution

1. Step 1: Write the proportion equation
   31,766.61 : 43,865.79 = 19,850.31 : x
2. Step 2: Convert to fraction form
   31,766.61/43,865.79 = 19,850.31/x
3. Step 3: Cross multiply
   31,766.61x = 43,865.79 × 19,850.31
4. Step 4: Simplify right side
   31,766.61x = 870,749,529.89
5. Step 5: Solve for x
   x = 870,749,529.89/31,766.61
6. Step 6: Final answer
   x = 27,410.84