Finding the Third Proportional to 577,123.50 and 862,453.50

Step by Step Solution

1. Step 1: Write the proportion equation
   577,123.50 : 862,453.50 = 862,453.50 : x
2. Step 2: Convert to fraction form
   577,123.50/862,453.50 = 862,453.50/x
3. Step 3: Cross multiply
   577,123.50x = 862,453.50 × 862,453.50
4. Step 4: Simplify right side
   577,123.50x = 743,826,039,662.25
5. Step 5: Solve for x
   x = 743,826,039,662.25/577,123.50
6. Step 6: Final answer
   x = 1,288,850.72