Finding the Fourth Proportional to 3,719.78, 5,579.50 and 946.56

Step by Step Solution

1. Step 1: Write the proportion equation
   3,719.78 : 5,579.50 = 946.56 : x
2. Step 2: Convert to fraction form
   3,719.78/5,579.50 = 946.56/x
3. Step 3: Cross multiply
   3,719.78x = 5,579.50 × 946.56
4. Step 4: Simplify right side
   3,719.78x = 5,281,331.52
5. Step 5: Solve for x
   x = 5,281,331.52/3,719.78
6. Step 6: Final answer
   x = 1,419.80