Finding the Third Proportional to 5,178,828 and 7,840,206

Step by Step Solution

1. Step 1: Write the proportion equation
   5,178,828 : 7,840,206 = 7,840,206 : x
2. Step 2: Convert to fraction form
   5,178,828/7,840,206 = 7,840,206/x
3. Step 3: Cross multiply
   5,178,828x = 7,840,206 × 7,840,206
4. Step 4: Simplify right side
   5,178,828x = 61,468,830,122,436
5. Step 5: Solve for x
   x = 61,468,830,122,436/5,178,828
6. Step 6: Final answer
   x = 11,869,255.00