Finding the Fourth Proportional to 3,360.33, 5,039.23 and 987.69

Step by Step Solution

1. Step 1: Write the proportion equation
   3,360.33 : 5,039.23 = 987.69 : x
2. Step 2: Convert to fraction form
   3,360.33/5,039.23 = 987.69/x
3. Step 3: Cross multiply
   3,360.33x = 5,039.23 × 987.69
4. Step 4: Simplify right side
   3,360.33x = 4,977,198.27
5. Step 5: Solve for x
   x = 4,977,198.27/3,360.33
6. Step 6: Final answer
   x = 1,481.16