Finding the Fourth Proportional to 2,245.89, 3,369.20 and 947.55

Step by Step Solution

1. Step 1: Write the proportion equation
   2,245.89 : 3,369.20 = 947.55 : x
2. Step 2: Convert to fraction form
   2,245.89/3,369.20 = 947.55/x
3. Step 3: Cross multiply
   2,245.89x = 3,369.20 × 947.55
4. Step 4: Simplify right side
   2,245.89x = 3,192,480.72
5. Step 5: Solve for x
   x = 3,192,480.72/2,245.89
6. Step 6: Final answer
   x = 1,421.48