Finding the Third Proportional to 286,809 and 443,869.50

Step by Step Solution

1. Step 1: Write the proportion equation
   286,809 : 443,869.50 = 443,869.50 : x
2. Step 2: Convert to fraction form
   286,809/443,869.50 = 443,869.50/x
3. Step 3: Cross multiply
   286,809x = 443,869.50 × 443,869.50
4. Step 4: Simplify right side
   286,809x = 197,020,133,030.25
5. Step 5: Solve for x
   x = 197,020,133,030.25/286,809
6. Step 6: Final answer
   x = 686,938.46