Finding the Third Proportional to 258,384 and 548,088

Step by Step Solution

1. Step 1: Write the proportion equation
   258,384 : 548,088 = 548,088 : x
2. Step 2: Convert to fraction form
   258,384/548,088 = 548,088/x
3. Step 3: Cross multiply
   258,384x = 548,088 × 548,088
4. Step 4: Simplify right side
   258,384x = 300,400,455,744
5. Step 5: Solve for x
   x = 300,400,455,744/258,384
6. Step 6: Final answer
   x = 1,162,612.45