Finding the Third Proportional to 5,178,926 and 7,840,365

Step by Step Solution

1. Step 1: Write the proportion equation
   5,178,926 : 7,840,365 = 7,840,365 : x
2. Step 2: Convert to fraction form
   5,178,926/7,840,365 = 7,840,365/x
3. Step 3: Cross multiply
   5,178,926x = 7,840,365 × 7,840,365
4. Step 4: Simplify right side
   5,178,926x = 61,471,323,333,225
5. Step 5: Solve for x
   x = 61,471,323,333,225/5,178,926
6. Step 6: Final answer
   x = 11,869,511.81