Finding the Third Proportional to 201,061 and 418,659.50

Step by Step Solution

1. Step 1: Write the proportion equation
   201,061 : 418,659.50 = 418,659.50 : x
2. Step 2: Convert to fraction form
   201,061/418,659.50 = 418,659.50/x
3. Step 3: Cross multiply
   201,061x = 418,659.50 × 418,659.50
4. Step 4: Simplify right side
   201,061x = 175,275,776,940.25
5. Step 5: Solve for x
   x = 175,275,776,940.25/201,061
6. Step 6: Final answer
   x = 871,754.23