Finding the Third Proportional to 143,209.50 and 298,185

Step by Step Solution

1. Step 1: Write the proportion equation
   143,209.50 : 298,185 = 298,185 : x
2. Step 2: Convert to fraction form
   143,209.50/298,185 = 298,185/x
3. Step 3: Cross multiply
   143,209.50x = 298,185 × 298,185
4. Step 4: Simplify right side
   143,209.50x = 88,914,294,225
5. Step 5: Solve for x
   x = 88,914,294,225/143,209.50
6. Step 6: Final answer
   x = 620,868.69