Finding the Third Proportional to 285,401.25 and 614,947.50

Step by Step Solution

1. Step 1: Write the proportion equation
   285,401.25 : 614,947.50 = 614,947.50 : x
2. Step 2: Convert to fraction form
   285,401.25/614,947.50 = 614,947.50/x
3. Step 3: Cross multiply
   285,401.25x = 614,947.50 × 614,947.50
4. Step 4: Simplify right side
   285,401.25x = 378,160,427,756.25
5. Step 5: Solve for x
   x = 378,160,427,756.25/285,401.25
6. Step 6: Final answer
   x = 1,325,013.21