Finding the Third Proportional to 280,155.75 and 599,677.50

Step by Step Solution

1. Step 1: Write the proportion equation
   280,155.75 : 599,677.50 = 599,677.50 : x
2. Step 2: Convert to fraction form
   280,155.75/599,677.50 = 599,677.50/x
3. Step 3: Cross multiply
   280,155.75x = 599,677.50 × 599,677.50
4. Step 4: Simplify right side
   280,155.75x = 359,613,104,006.25
5. Step 5: Solve for x
   x = 359,613,104,006.25/280,155.75
6. Step 6: Final answer
   x = 1,283,618.50