Finding the Fourth Proportional to 3,123.72, 4,685.34 and 1,274.34

Step by Step Solution

1. Step 1: Write the proportion equation
   3,123.72 : 4,685.34 = 1,274.34 : x
2. Step 2: Convert to fraction form
   3,123.72/4,685.34 = 1,274.34/x
3. Step 3: Cross multiply
   3,123.72x = 4,685.34 × 1,274.34
4. Step 4: Simplify right side
   3,123.72x = 5,970,716.18
5. Step 5: Solve for x
   x = 5,970,716.18/3,123.72
6. Step 6: Final answer
   x = 1,911.41