Finding the Fourth Proportional to 31,283.31, 46,938.24 and 20,757

Step by Step Solution

1. Step 1: Write the proportion equation
   31,283.31 : 46,938.24 = 20,757 : x
2. Step 2: Convert to fraction form
   31,283.31/46,938.24 = 20,757/x
3. Step 3: Cross multiply
   31,283.31x = 46,938.24 × 20,757
4. Step 4: Simplify right side
   31,283.31x = 974,297,047.68
5. Step 5: Solve for x
   x = 974,297,047.68/31,283.31
6. Step 6: Final answer
   x = 31,144.31