Finding the Third Proportional to 577,765.50 and 1,288,300.50

Step by Step Solution

1. Step 1: Write the proportion equation
   577,765.50 : 1,288,300.50 = 1,288,300.50 : x
2. Step 2: Convert to fraction form
   577,765.50/1,288,300.50 = 1,288,300.50/x
3. Step 3: Cross multiply
   577,765.50x = 1,288,300.50 × 1,288,300.50
4. Step 4: Simplify right side
   577,765.50x = 1,659,718,178,300.25
5. Step 5: Solve for x
   x = 1,659,718,178,300.25/577,765.50
6. Step 6: Final answer
   x = 2,872,650.20