Finding the Third Proportional to 240,690.50 and 521,514.50

Step by Step Solution

1. Step 1: Write the proportion equation
   240,690.50 : 521,514.50 = 521,514.50 : x
2. Step 2: Convert to fraction form
   240,690.50/521,514.50 = 521,514.50/x
3. Step 3: Cross multiply
   240,690.50x = 521,514.50 × 521,514.50
4. Step 4: Simplify right side
   240,690.50x = 271,977,373,710.25
5. Step 5: Solve for x
   x = 271,977,373,710.25/240,690.50
6. Step 6: Final answer
   x = 1,129,987.99