Finding the Third Proportional to 402,783,196 and 867,543,238

Step by Step Solution

1. Step 1: Write the proportion equation
   402,783,196 : 867,543,238 = 867,543,238 : x
2. Step 2: Convert to fraction form
   402,783,196/867,543,238 = 867,543,238/x
3. Step 3: Cross multiply
   402,783,196x = 867,543,238 × 867,543,238
4. Step 4: Simplify right side
   402,783,196x = 752,631,269,799,524,608
5. Step 5: Solve for x
   x = 752,631,269,799,524,608/402,783,196
6. Step 6: Final answer
   x = 1,868,576,636.94