Finding the Fourth Proportional to 8,139,647,809.30, 12,210,367,509.15 and 2,970,909,505.30

Step by Step Solution

1. Step 1: Write the proportion equation
   8,139,647,809.30 : 12,210,367,509.15 = 2,970,909,505.30 : x
2. Step 2: Convert to fraction form
   8,139,647,809.30/12,210,367,509.15 = 2,970,909,505.30/x
3. Step 3: Cross multiply
   8,139,647,809.30x = 12,210,367,509.15 × 2,970,909,505.30
4. Step 4: Simplify right side
   8,139,647,809.30x = 36,275,896,896,140,021,760
5. Step 5: Solve for x
   x = 36,275,896,896,140,021,760/8,139,647,809.30
6. Step 6: Final answer
   x = 4,456,691,216.38