Finding the Third Proportional to 280,669.50 and 612,126

Step by Step Solution

1. Step 1: Write the proportion equation
   280,669.50 : 612,126 = 612,126 : x
2. Step 2: Convert to fraction form
   280,669.50/612,126 = 612,126/x
3. Step 3: Cross multiply
   280,669.50x = 612,126 × 612,126
4. Step 4: Simplify right side
   280,669.50x = 374,698,239,876
5. Step 5: Solve for x
   x = 374,698,239,876/280,669.50
6. Step 6: Final answer
   x = 1,335,015.88