Finding the Third Proportional to 143,622 and 312,508.50

Step by Step Solution

1. Step 1: Write the proportion equation
   143,622 : 312,508.50 = 312,508.50 : x
2. Step 2: Convert to fraction form
   143,622/312,508.50 = 312,508.50/x
3. Step 3: Cross multiply
   143,622x = 312,508.50 × 312,508.50
4. Step 4: Simplify right side
   143,622x = 97,661,562,572.25
5. Step 5: Solve for x
   x = 97,661,562,572.25/143,622
6. Step 6: Final answer
   x = 679,990.27