Finding the Fourth Proportional to 2,638,744,647.09, 3,639,794,262.89 and 1,621,024,721.97

Step by Step Solution

1. Step 1: Write the proportion equation
   2,638,744,647.09 : 3,639,794,262.89 = 1,621,024,721.97 : x
2. Step 2: Convert to fraction form
   2,638,744,647.09/3,639,794,262.89 = 1,621,024,721.97/x
3. Step 3: Cross multiply
   2,638,744,647.09x = 3,639,794,262.89 × 1,621,024,721.97
4. Step 4: Simplify right side
   2,638,744,647.09x = 5,900,196,483,021,158,400
5. Step 5: Solve for x
   x = 5,900,196,483,021,158,400/2,638,744,647.09
6. Step 6: Final answer
   x = 2,235,986,149.52