Finding the Third Proportional to 20,957.63 and 31,390.88

Step by Step Solution

1. Step 1: Write the proportion equation
   20,957.63 : 31,390.88 = 31,390.88 : x
2. Step 2: Convert to fraction form
   20,957.63/31,390.88 = 31,390.88/x
3. Step 3: Cross multiply
   20,957.63x = 31,390.88 × 31,390.88
4. Step 4: Simplify right side
   20,957.63x = 985,387,033.27
5. Step 5: Solve for x
   x = 985,387,033.27/20,957.63
6. Step 6: Final answer
   x = 47,018.07