Finding the Third Proportional to 239,017.50 and 522,139.50

Step by Step Solution

1. Step 1: Write the proportion equation
   239,017.50 : 522,139.50 = 522,139.50 : x
2. Step 2: Convert to fraction form
   239,017.50/522,139.50 = 522,139.50/x
3. Step 3: Cross multiply
   239,017.50x = 522,139.50 × 522,139.50
4. Step 4: Simplify right side
   239,017.50x = 272,629,657,460.25
5. Step 5: Solve for x
   x = 272,629,657,460.25/239,017.50
6. Step 6: Final answer
   x = 1,140,626.35