Finding the Fourth Proportional to 1,989.69, 2,978.37 and 1,694.44

Step by Step Solution

1. Step 1: Write the proportion equation
   1,989.69 : 2,978.37 = 1,694.44 : x
2. Step 2: Convert to fraction form
   1,989.69/2,978.37 = 1,694.44/x
3. Step 3: Cross multiply
   1,989.69x = 2,978.37 × 1,694.44
4. Step 4: Simplify right side
   1,989.69x = 5,046,672.99
5. Step 5: Solve for x
   x = 5,046,672.99/1,989.69
6. Step 6: Final answer
   x = 2,536.42