Finding the Third Proportional to 405,069.50 and 886,385

Step by Step Solution

1. Step 1: Write the proportion equation
   405,069.50 : 886,385 = 886,385 : x
2. Step 2: Convert to fraction form
   405,069.50/886,385 = 886,385/x
3. Step 3: Cross multiply
   405,069.50x = 886,385 × 886,385
4. Step 4: Simplify right side
   405,069.50x = 785,678,368,225
5. Step 5: Solve for x
   x = 785,678,368,225/405,069.50
6. Step 6: Final answer
   x = 1,939,613.74