Finding the Third Proportional to 30,820.50 and 45,258.75

Step by Step Solution

1. Step 1: Write the proportion equation
   30,820.50 : 45,258.75 = 45,258.75 : x
2. Step 2: Convert to fraction form
   30,820.50/45,258.75 = 45,258.75/x
3. Step 3: Cross multiply
   30,820.50x = 45,258.75 × 45,258.75
4. Step 4: Simplify right side
   30,820.50x = 2,048,354,451.56
5. Step 5: Solve for x
   x = 2,048,354,451.56/30,820.50
6. Step 6: Final answer
   x = 66,460.78