Finding the Fourth Proportional to 2,067.76, 3,100.60 and 661.98

Step by Step Solution

1. Step 1: Write the proportion equation
   2,067.76 : 3,100.60 = 661.98 : x
2. Step 2: Convert to fraction form
   2,067.76/3,100.60 = 661.98/x
3. Step 3: Cross multiply
   2,067.76x = 3,100.60 × 661.98
4. Step 4: Simplify right side
   2,067.76x = 2,052,535.19
5. Step 5: Solve for x
   x = 2,052,535.19/2,067.76
6. Step 6: Final answer
   x = 992.64