Finding the Third Proportional to 521,136 and 825,869.25

Step by Step Solution

1. Step 1: Write the proportion equation
   521,136 : 825,869.25 = 825,869.25 : x
2. Step 2: Convert to fraction form
   521,136/825,869.25 = 825,869.25/x
3. Step 3: Cross multiply
   521,136x = 825,869.25 × 825,869.25
4. Step 4: Simplify right side
   521,136x = 682,060,018,095.56
5. Step 5: Solve for x
   x = 682,060,018,095.56/521,136
6. Step 6: Final answer
   x = 1,308,794.67