Finding the Third Proportional to 20,639.25 and 45,389.25

Step by Step Solution

1. Step 1: Write the proportion equation
   20,639.25 : 45,389.25 = 45,389.25 : x
2. Step 2: Convert to fraction form
   20,639.25/45,389.25 = 45,389.25/x
3. Step 3: Cross multiply
   20,639.25x = 45,389.25 × 45,389.25
4. Step 4: Simplify right side
   20,639.25x = 2,060,184,015.56
5. Step 5: Solve for x
   x = 2,060,184,015.56/20,639.25
6. Step 6: Final answer
   x = 99,818.74