Finding the Fourth Proportional to 1,396.89, 1,940.34 and 1,374.56

Step by Step Solution

1. Step 1: Write the proportion equation
   1,396.89 : 1,940.34 = 1,374.56 : x
2. Step 2: Convert to fraction form
   1,396.89/1,940.34 = 1,374.56/x
3. Step 3: Cross multiply
   1,396.89x = 1,940.34 × 1,374.56
4. Step 4: Simplify right side
   1,396.89x = 2,667,097.18
5. Step 5: Solve for x
   x = 2,667,097.18/1,396.89
6. Step 6: Final answer
   x = 1,909.32