Finding the Fourth Proportional to 2,134, 2,942.89 and 1,388.53

Step by Step Solution

1. Step 1: Write the proportion equation
   2,134 : 2,942.89 = 1,388.53 : x
2. Step 2: Convert to fraction form
   2,134/2,942.89 = 1,388.53/x
3. Step 3: Cross multiply
   2,134x = 2,942.89 × 1,388.53
4. Step 4: Simplify right side
   2,134x = 4,086,291.05
5. Step 5: Solve for x
   x = 4,086,291.05/2,134
6. Step 6: Final answer
   x = 1,914.85