Finding the Third Proportional to 402,783,155 and 867,543,147

Step by Step Solution

1. Step 1: Write the proportion equation
   402,783,155 : 867,543,147 = 867,543,147 : x
2. Step 2: Convert to fraction form
   402,783,155/867,543,147 = 867,543,147/x
3. Step 3: Cross multiply
   402,783,155x = 867,543,147 × 867,543,147
4. Step 4: Simplify right side
   402,783,155x = 752,631,111,906,663,552
5. Step 5: Solve for x
   x = 752,631,111,906,663,552/402,783,155
6. Step 6: Final answer
   x = 1,868,576,435.15