Finding the Third Proportional to 5,664,568 and 8,543,859

Step by Step Solution

1. Step 1: Write the proportion equation
   5,664,568 : 8,543,859 = 8,543,859 : x
2. Step 2: Convert to fraction form
   5,664,568/8,543,859 = 8,543,859/x
3. Step 3: Cross multiply
   5,664,568x = 8,543,859 × 8,543,859
4. Step 4: Simplify right side
   5,664,568x = 72,997,526,611,881
5. Step 5: Solve for x
   x = 72,997,526,611,881/5,664,568
6. Step 6: Final answer
   x = 12,886,689.08