Finding the Third Proportional to 288,485 and 748,890.50

Step by Step Solution

1. Step 1: Write the proportion equation
   288,485 : 748,890.50 = 748,890.50 : x
2. Step 2: Convert to fraction form
   288,485/748,890.50 = 748,890.50/x
3. Step 3: Cross multiply
   288,485x = 748,890.50 × 748,890.50
4. Step 4: Simplify right side
   288,485x = 560,836,980,990.25
5. Step 5: Solve for x
   x = 560,836,980,990.25/288,485
6. Step 6: Final answer
   x = 1,944,076.75