Finding the Third Proportional to 402,783,118 and 867,543,078

Step by Step Solution

1. Step 1: Write the proportion equation
   402,783,118 : 867,543,078 = 867,543,078 : x
2. Step 2: Convert to fraction form
   402,783,118/867,543,078 = 867,543,078/x
3. Step 3: Cross multiply
   402,783,118x = 867,543,078 × 867,543,078
4. Step 4: Simplify right side
   402,783,118x = 752,630,992,185,714,048
5. Step 5: Solve for x
   x = 752,630,992,185,714,048/402,783,118
6. Step 6: Final answer
   x = 1,868,576,309.56