Finding the Fourth Proportional to 3,579.89, 5,369.23 and 947.43

Step by Step Solution

1. Step 1: Write the proportion equation
   3,579.89 : 5,369.23 = 947.43 : x
2. Step 2: Convert to fraction form
   3,579.89/5,369.23 = 947.43/x
3. Step 3: Cross multiply
   3,579.89x = 5,369.23 × 947.43
4. Step 4: Simplify right side
   3,579.89x = 5,086,969.58
5. Step 5: Solve for x
   x = 5,086,969.58/3,579.89
6. Step 6: Final answer
   x = 1,420.98