Finding the Third Proportional to 300,496.50 and 612,123.75

Step by Step Solution

1. Step 1: Write the proportion equation
   300,496.50 : 612,123.75 = 612,123.75 : x
2. Step 2: Convert to fraction form
   300,496.50/612,123.75 = 612,123.75/x
3. Step 3: Cross multiply
   300,496.50x = 612,123.75 × 612,123.75
4. Step 4: Simplify right side
   300,496.50x = 374,695,485,314.06
5. Step 5: Solve for x
   x = 374,695,485,314.06/300,496.50
6. Step 6: Final answer
   x = 1,246,921.30