Finding the Third Proportional to 3,861,788 and 5,078,260

Step by Step Solution

1. Step 1: Write the proportion equation
   3,861,788 : 5,078,260 = 5,078,260 : x
2. Step 2: Convert to fraction form
   3,861,788/5,078,260 = 5,078,260/x
3. Step 3: Cross multiply
   3,861,788x = 5,078,260 × 5,078,260
4. Step 4: Simplify right side
   3,861,788x = 25,788,724,627,600
5. Step 5: Solve for x
   x = 25,788,724,627,600/3,861,788
6. Step 6: Final answer
   x = 6,677,923.45