Finding the Third Proportional to 258,714 and 562,990.50

Step by Step Solution

1. Step 1: Write the proportion equation
   258,714 : 562,990.50 = 562,990.50 : x
2. Step 2: Convert to fraction form
   258,714/562,990.50 = 562,990.50/x
3. Step 3: Cross multiply
   258,714x = 562,990.50 × 562,990.50
4. Step 4: Simplify right side
   258,714x = 316,958,303,090.25
5. Step 5: Solve for x
   x = 316,958,303,090.25/258,714
6. Step 6: Final answer
   x = 1,225,130.08