Finding the Third Proportional to 337,111.50 and 728,209.50

Step by Step Solution

1. Step 1: Write the proportion equation
   337,111.50 : 728,209.50 = 728,209.50 : x
2. Step 2: Convert to fraction form
   337,111.50/728,209.50 = 728,209.50/x
3. Step 3: Cross multiply
   337,111.50x = 728,209.50 × 728,209.50
4. Step 4: Simplify right side
   337,111.50x = 530,289,075,890.25
5. Step 5: Solve for x
   x = 530,289,075,890.25/337,111.50
6. Step 6: Final answer
   x = 1,573,037.63