Finding the Fourth Proportional to 3,067.56, 4,601.99 and 987.72

Step by Step Solution

1. Step 1: Write the proportion equation
   3,067.56 : 4,601.99 = 987.72 : x
2. Step 2: Convert to fraction form
   3,067.56/4,601.99 = 987.72/x
3. Step 3: Cross multiply
   3,067.56x = 4,601.99 × 987.72
4. Step 4: Simplify right side
   3,067.56x = 4,545,477.56
5. Step 5: Solve for x
   x = 4,545,477.56/3,067.56
6. Step 6: Final answer
   x = 1,481.79