Finding the Third Proportional to 5,664,572 and 8,543,889

Step by Step Solution

1. Step 1: Write the proportion equation
   5,664,572 : 8,543,889 = 8,543,889 : x
2. Step 2: Convert to fraction form
   5,664,572/8,543,889 = 8,543,889/x
3. Step 3: Cross multiply
   5,664,572x = 8,543,889 × 8,543,889
4. Step 4: Simplify right side
   5,664,572x = 72,998,039,244,321
5. Step 5: Solve for x
   x = 72,998,039,244,321/5,664,572
6. Step 6: Final answer
   x = 12,886,770.48