Finding the Third Proportional to 20,486.25 and 43,031.25

Step by Step Solution

1. Step 1: Write the proportion equation
   20,486.25 : 43,031.25 = 43,031.25 : x
2. Step 2: Convert to fraction form
   20,486.25/43,031.25 = 43,031.25/x
3. Step 3: Cross multiply
   20,486.25x = 43,031.25 × 43,031.25
4. Step 4: Simplify right side
   20,486.25x = 1,851,688,476.56
5. Step 5: Solve for x
   x = 1,851,688,476.56/20,486.25
6. Step 6: Final answer
   x = 90,386.89