Finding the Fourth Proportional to 105,389,175.16, 158,264,673 and 64,687,618

Step by Step Solution

1. Step 1: Write the proportion equation
   105,389,175.16 : 158,264,673 = 64,687,618 : x
2. Step 2: Convert to fraction form
   105,389,175.16/158,264,673 = 64,687,618/x
3. Step 3: Cross multiply
   105,389,175.16x = 158,264,673 × 64,687,618
4. Step 4: Simplify right side
   105,389,175.16x = 10,237,764,709,918,914
5. Step 5: Solve for x
   x = 10,237,764,709,918,914/105,389,175.16
6. Step 6: Final answer
   x = 97,142,469.28