Finding the Fourth Proportional to 2,985.15, 4,118.57 and 1,789.89

Step by Step Solution

1. Step 1: Write the proportion equation
   2,985.15 : 4,118.57 = 1,789.89 : x
2. Step 2: Convert to fraction form
   2,985.15/4,118.57 = 1,789.89/x
3. Step 3: Cross multiply
   2,985.15x = 4,118.57 × 1,789.89
4. Step 4: Simplify right side
   2,985.15x = 7,371,778.31
5. Step 5: Solve for x
   x = 7,371,778.31/2,985.15
6. Step 6: Final answer
   x = 2,469.48