Finding the Fourth Proportional to 2,100.53, 3,149.89 and 930.49

Step by Step Solution

1. Step 1: Write the proportion equation
   2,100.53 : 3,149.89 = 930.49 : x
2. Step 2: Convert to fraction form
   2,100.53/3,149.89 = 930.49/x
3. Step 3: Cross multiply
   2,100.53x = 3,149.89 × 930.49
4. Step 4: Simplify right side
   2,100.53x = 2,930,930.95
5. Step 5: Solve for x
   x = 2,930,930.95/2,100.53
6. Step 6: Final answer
   x = 1,395.33