Finding the Fourth Proportional to 2,086,204,085.87, 3,129,790,158.76 and 687,138,150.64

Step by Step Solution

1. Step 1: Write the proportion equation
   2,086,204,085.87 : 3,129,790,158.76 = 687,138,150.64 : x
2. Step 2: Convert to fraction form
   2,086,204,085.87/3,129,790,158.76 = 687,138,150.64/x
3. Step 3: Cross multiply
   2,086,204,085.87x = 3,129,790,158.76 × 687,138,150.64
4. Step 4: Simplify right side
   2,086,204,085.87x = 2,150,598,221,589,443,072
5. Step 5: Solve for x
   x = 2,150,598,221,589,443,072/2,086,204,085.87
6. Step 6: Final answer
   x = 1,030,866,652.10