Finding the Third Proportional to 258,147 and 555,842.25

Step by Step Solution

1. Step 1: Write the proportion equation
   258,147 : 555,842.25 = 555,842.25 : x
2. Step 2: Convert to fraction form
   258,147/555,842.25 = 555,842.25/x
3. Step 3: Cross multiply
   258,147x = 555,842.25 × 555,842.25
4. Step 4: Simplify right side
   258,147x = 308,960,606,885.06
5. Step 5: Solve for x
   x = 308,960,606,885.06/258,147
6. Step 6: Final answer
   x = 1,196,839.81