Finding the Fourth Proportional to 9,697,638, 13,391,391.18 and 9,238,236.78

Step by Step Solution

1. Step 1: Write the proportion equation
   9,697,638 : 13,391,391.18 = 9,238,236.78 : x
2. Step 2: Convert to fraction form
   9,697,638/13,391,391.18 = 9,238,236.78/x
3. Step 3: Cross multiply
   9,697,638x = 13,391,391.18 × 9,238,236.78
4. Step 4: Simplify right side
   9,697,638x = 123,712,842,534,443.59
5. Step 5: Solve for x
   x = 123,712,842,534,443.59/9,697,638
6. Step 6: Final answer
   x = 12,757,007.69