Finding the Fourth Proportional to 3,961.98, 5,931.90 and 2,985.12

Step by Step Solution

1. Step 1: Write the proportion equation
   3,961.98 : 5,931.90 = 2,985.12 : x
2. Step 2: Convert to fraction form
   3,961.98/5,931.90 = 2,985.12/x
3. Step 3: Cross multiply
   3,961.98x = 5,931.90 × 2,985.12
4. Step 4: Simplify right side
   3,961.98x = 17,707,433.33
5. Step 5: Solve for x
   x = 17,707,433.33/3,961.98
6. Step 6: Final answer
   x = 4,469.34