Finding the Third Proportional to 20,428.88 and 31,237.31

Step by Step Solution

1. Step 1: Write the proportion equation
   20,428.88 : 31,237.31 = 31,237.31 : x
2. Step 2: Convert to fraction form
   20,428.88/31,237.31 = 31,237.31/x
3. Step 3: Cross multiply
   20,428.88x = 31,237.31 × 31,237.31
4. Step 4: Simplify right side
   20,428.88x = 975,769,692.22
5. Step 5: Solve for x
   x = 975,769,692.22/20,428.88
6. Step 6: Final answer
   x = 47,764.24