Finding the Fourth Proportional to 199,234,155.98, 275,031,297.72 and 128,704,155.71

Step by Step Solution

1. Step 1: Write the proportion equation
   199,234,155.98 : 275,031,297.72 = 128,704,155.71 : x
2. Step 2: Convert to fraction form
   199,234,155.98/275,031,297.72 = 128,704,155.71/x
3. Step 3: Cross multiply
   199,234,155.98x = 275,031,297.72 × 128,704,155.71
4. Step 4: Simplify right side
   199,234,155.98x = 35,397,670,965,503,096
5. Step 5: Solve for x
   x = 35,397,670,965,503,096/199,234,155.98
6. Step 6: Final answer
   x = 177,668,687.33