Finding the Third Proportional to 402,783,142 and 867,543,124

Step by Step Solution

1. Step 1: Write the proportion equation
   402,783,142 : 867,543,124 = 867,543,124 : x
2. Step 2: Convert to fraction form
   402,783,142/867,543,124 = 867,543,124/x
3. Step 3: Cross multiply
   402,783,142x = 867,543,124 × 867,543,124
4. Step 4: Simplify right side
   402,783,142x = 752,631,071,999,679,360
5. Step 5: Solve for x
   x = 752,631,071,999,679,360/402,783,142
6. Step 6: Final answer
   x = 1,868,576,396.38