Finding the Third Proportional to 3,609,240 and 5,078,128

Step by Step Solution

1. Step 1: Write the proportion equation
   3,609,240 : 5,078,128 = 5,078,128 : x
2. Step 2: Convert to fraction form
   3,609,240/5,078,128 = 5,078,128/x
3. Step 3: Cross multiply
   3,609,240x = 5,078,128 × 5,078,128
4. Step 4: Simplify right side
   3,609,240x = 25,787,383,984,384
5. Step 5: Solve for x
   x = 25,787,383,984,384/3,609,240
6. Step 6: Final answer
   x = 7,144,823.84