Finding the Third Proportional to 143,502.50 and 298,807.50

Step by Step Solution

1. Step 1: Write the proportion equation
   143,502.50 : 298,807.50 = 298,807.50 : x
2. Step 2: Convert to fraction form
   143,502.50/298,807.50 = 298,807.50/x
3. Step 3: Cross multiply
   143,502.50x = 298,807.50 × 298,807.50
4. Step 4: Simplify right side
   143,502.50x = 89,285,922,056.25
5. Step 5: Solve for x
   x = 89,285,922,056.25/143,502.50
6. Step 6: Final answer
   x = 622,190.71