Finding the Third Proportional to 129,401 and 282,858.50

Step by Step Solution

1. Step 1: Write the proportion equation
   129,401 : 282,858.50 = 282,858.50 : x
2. Step 2: Convert to fraction form
   129,401/282,858.50 = 282,858.50/x
3. Step 3: Cross multiply
   129,401x = 282,858.50 × 282,858.50
4. Step 4: Simplify right side
   129,401x = 80,008,931,022.25
5. Step 5: Solve for x
   x = 80,008,931,022.25/129,401
6. Step 6: Final answer
   x = 618,302.26