Finding the Fourth Proportional to 3,869.09, 5,803.72 and 947.42

Step by Step Solution

1. Step 1: Write the proportion equation
   3,869.09 : 5,803.72 = 947.42 : x
2. Step 2: Convert to fraction form
   3,869.09/5,803.72 = 947.42/x
3. Step 3: Cross multiply
   3,869.09x = 5,803.72 × 947.42
4. Step 4: Simplify right side
   3,869.09x = 5,498,560.40
5. Step 5: Solve for x
   x = 5,498,560.40/3,869.09
6. Step 6: Final answer
   x = 1,421.15