Finding the Third Proportional to 3,645,784 and 7,978,040

Step by Step Solution

1. Step 1: Write the proportion equation
   3,645,784 : 7,978,040 = 7,978,040 : x
2. Step 2: Convert to fraction form
   3,645,784/7,978,040 = 7,978,040/x
3. Step 3: Cross multiply
   3,645,784x = 7,978,040 × 7,978,040
4. Step 4: Simplify right side
   3,645,784x = 63,649,122,241,600
5. Step 5: Solve for x
   x = 63,649,122,241,600/3,645,784
6. Step 6: Final answer
   x = 17,458,281.19