Finding the Third Proportional to 288,319.50 and 632,179.69

Step by Step Solution

1. Step 1: Write the proportion equation
   288,319.50 : 632,179.69 = 632,179.69 : x
2. Step 2: Convert to fraction form
   288,319.50/632,179.69 = 632,179.69/x
3. Step 3: Cross multiply
   288,319.50x = 632,179.69 × 632,179.69
4. Step 4: Simplify right side
   288,319.50x = 399,651,157,287.60
5. Step 5: Solve for x
   x = 399,651,157,287.60/288,319.50
6. Step 6: Final answer
   x = 1,386,139.88