Finding the Third Proportional to 5,478,018 and 8,516,043

Step by Step Solution

1. Step 1: Write the proportion equation
   5,478,018 : 8,516,043 = 8,516,043 : x
2. Step 2: Convert to fraction form
   5,478,018/8,516,043 = 8,516,043/x
3. Step 3: Cross multiply
   5,478,018x = 8,516,043 × 8,516,043
4. Step 4: Simplify right side
   5,478,018x = 72,522,988,377,849
5. Step 5: Solve for x
   x = 72,522,988,377,849/5,478,018
6. Step 6: Final answer
   x = 13,238,910.20