Finding the Third Proportional to 361,111.50 and 558,850.50

Step by Step Solution

1. Step 1: Write the proportion equation
   361,111.50 : 558,850.50 = 558,850.50 : x
2. Step 2: Convert to fraction form
   361,111.50/558,850.50 = 558,850.50/x
3. Step 3: Cross multiply
   361,111.50x = 558,850.50 × 558,850.50
4. Step 4: Simplify right side
   361,111.50x = 312,313,881,350.25
5. Step 5: Solve for x
   x = 312,313,881,350.25/361,111.50
6. Step 6: Final answer
   x = 864,868.28