Finding the Fourth Proportional to 40,671.89, 56,087.78 and 31,716.12

Step by Step Solution

1. Step 1: Write the proportion equation
   40,671.89 : 56,087.78 = 31,716.12 : x
2. Step 2: Convert to fraction form
   40,671.89/56,087.78 = 31,716.12/x
3. Step 3: Cross multiply
   40,671.89x = 56,087.78 × 31,716.12
4. Step 4: Simplify right side
   40,671.89x = 1,778,886,812.76
5. Step 5: Solve for x
   x = 1,778,886,812.76/40,671.89
6. Step 6: Final answer
   x = 43,737.50