Finding the Fourth Proportional to 199,128.87, 274,796.78 and 108,484.61

Step by Step Solution

1. Step 1: Write the proportion equation
   199,128.87 : 274,796.78 = 108,484.61 : x
2. Step 2: Convert to fraction form
   199,128.87/274,796.78 = 108,484.61/x
3. Step 3: Cross multiply
   199,128.87x = 274,796.78 × 108,484.61
4. Step 4: Simplify right side
   199,128.87x = 29,811,219,591.15
5. Step 5: Solve for x
   x = 29,811,219,591.15/199,128.87
6. Step 6: Final answer
   x = 149,708.17