Finding the Third Proportional to 5,258,438 and 7,866,642

Step by Step Solution

1. Step 1: Write the proportion equation
   5,258,438 : 7,866,642 = 7,866,642 : x
2. Step 2: Convert to fraction form
   5,258,438/7,866,642 = 7,866,642/x
3. Step 3: Cross multiply
   5,258,438x = 7,866,642 × 7,866,642
4. Step 4: Simplify right side
   5,258,438x = 61,884,056,356,164
5. Step 5: Solve for x
   x = 61,884,056,356,164/5,258,438
6. Step 6: Final answer
   x = 11,768,524.49