Finding the Third Proportional to 258,923.50 and 553,826

Step by Step Solution

1. Step 1: Write the proportion equation
   258,923.50 : 553,826 = 553,826 : x
2. Step 2: Convert to fraction form
   258,923.50/553,826 = 553,826/x
3. Step 3: Cross multiply
   258,923.50x = 553,826 × 553,826
4. Step 4: Simplify right side
   258,923.50x = 306,723,238,276
5. Step 5: Solve for x
   x = 306,723,238,276/258,923.50
6. Step 6: Final answer
   x = 1,184,609.50