Finding the Third Proportional to 438,412 and 660,514.50

Step by Step Solution

1. Step 1: Write the proportion equation
   438,412 : 660,514.50 = 660,514.50 : x
2. Step 2: Convert to fraction form
   438,412/660,514.50 = 660,514.50/x
3. Step 3: Cross multiply
   438,412x = 660,514.50 × 660,514.50
4. Step 4: Simplify right side
   438,412x = 436,279,404,710.25
5. Step 5: Solve for x
   x = 436,279,404,710.25/438,412
6. Step 6: Final answer
   x = 995,135.64