Finding the Fourth Proportional to 1,789.38, 2,684.06 and 1,428.53

Step by Step Solution

1. Step 1: Write the proportion equation
   1,789.38 : 2,684.06 = 1,428.53 : x
2. Step 2: Convert to fraction form
   1,789.38/2,684.06 = 1,428.53/x
3. Step 3: Cross multiply
   1,789.38x = 2,684.06 × 1,428.53
4. Step 4: Simplify right side
   1,789.38x = 3,834,239.67
5. Step 5: Solve for x
   x = 3,834,239.67/1,789.38
6. Step 6: Final answer
   x = 2,142.78