Finding the Fourth Proportional to 1,905.05, 2,850.40 and 1,125.49

Step by Step Solution

1. Step 1: Write the proportion equation
   1,905.05 : 2,850.40 = 1,125.49 : x
2. Step 2: Convert to fraction form
   1,905.05/2,850.40 = 1,125.49/x
3. Step 3: Cross multiply
   1,905.05x = 2,850.40 × 1,125.49
4. Step 4: Simplify right side
   1,905.05x = 3,208,086.76
5. Step 5: Solve for x
   x = 3,208,086.76/1,905.05
6. Step 6: Final answer
   x = 1,683.99