Finding the Third Proportional to 21,128.34 and 31,626.70

Step by Step Solution

1. Step 1: Write the proportion equation
   21,128.34 : 31,626.70 = 31,626.70 : x
2. Step 2: Convert to fraction form
   21,128.34/31,626.70 = 31,626.70/x
3. Step 3: Cross multiply
   21,128.34x = 31,626.70 × 31,626.70
4. Step 4: Simplify right side
   21,128.34x = 1,000,248,350.56
5. Step 5: Solve for x
   x = 1,000,248,350.56/21,128.34
6. Step 6: Final answer
   x = 47,341.54