Finding the Fourth Proportional to 31,335.53, 47,019.46 and 20,812.82

Step by Step Solution

1. Step 1: Write the proportion equation
   31,335.53 : 47,019.46 = 20,812.82 : x
2. Step 2: Convert to fraction form
   31,335.53/47,019.46 = 20,812.82/x
3. Step 3: Cross multiply
   31,335.53x = 47,019.46 × 20,812.82
4. Step 4: Simplify right side
   31,335.53x = 978,607,557.48
5. Step 5: Solve for x
   x = 978,607,557.48/31,335.53
6. Step 6: Final answer
   x = 31,229.97