Finding the Third Proportional to 358,812 and 555,223.50

Step by Step Solution

1. Step 1: Write the proportion equation
   358,812 : 555,223.50 = 555,223.50 : x
2. Step 2: Convert to fraction form
   358,812/555,223.50 = 555,223.50/x
3. Step 3: Cross multiply
   358,812x = 555,223.50 × 555,223.50
4. Step 4: Simplify right side
   358,812x = 308,273,134,952.25
5. Step 5: Solve for x
   x = 308,273,134,952.25/358,812
6. Step 6: Final answer
   x = 859,149.46