Finding the Third Proportional to 258,697.50 and 565,488

Step by Step Solution

1. Step 1: Write the proportion equation
   258,697.50 : 565,488 = 565,488 : x
2. Step 2: Convert to fraction form
   258,697.50/565,488 = 565,488/x
3. Step 3: Cross multiply
   258,697.50x = 565,488 × 565,488
4. Step 4: Simplify right side
   258,697.50x = 319,776,678,144
5. Step 5: Solve for x
   x = 319,776,678,144/258,697.50
6. Step 6: Final answer
   x = 1,236,102.70