Finding the Third Proportional to 2,578,178 and 5,529,412

Step by Step Solution

1. Step 1: Write the proportion equation
   2,578,178 : 5,529,412 = 5,529,412 : x
2. Step 2: Convert to fraction form
   2,578,178/5,529,412 = 5,529,412/x
3. Step 3: Cross multiply
   2,578,178x = 5,529,412 × 5,529,412
4. Step 4: Simplify right side
   2,578,178x = 30,574,397,065,744
5. Step 5: Solve for x
   x = 30,574,397,065,744/2,578,178
6. Step 6: Final answer
   x = 11,858,916.28