Finding the Third Proportional to 21,143.25 and 31,649.63

Step by Step Solution

1. Step 1: Write the proportion equation
   21,143.25 : 31,649.63 = 31,649.63 : x
2. Step 2: Convert to fraction form
   21,143.25/31,649.63 = 31,649.63/x
3. Step 3: Cross multiply
   21,143.25x = 31,649.63 × 31,649.63
4. Step 4: Simplify right side
   21,143.25x = 1,001,698,762.64
5. Step 5: Solve for x
   x = 1,001,698,762.64/21,143.25
6. Step 6: Final answer
   x = 47,376.76