Finding the Third Proportional to 289,136 and 626,538.50

Step by Step Solution

1. Step 1: Write the proportion equation
   289,136 : 626,538.50 = 626,538.50 : x
2. Step 2: Convert to fraction form
   289,136/626,538.50 = 626,538.50/x
3. Step 3: Cross multiply
   289,136x = 626,538.50 × 626,538.50
4. Step 4: Simplify right side
   289,136x = 392,550,491,982.25
5. Step 5: Solve for x
   x = 392,550,491,982.25/289,136
6. Step 6: Final answer
   x = 1,357,667.30