Finding the Fourth Proportional to 3,316.39, 4,971.48 and 1,123.57

Step by Step Solution

1. Step 1: Write the proportion equation
   3,316.39 : 4,971.48 = 1,123.57 : x
2. Step 2: Convert to fraction form
   3,316.39/4,971.48 = 1,123.57/x
3. Step 3: Cross multiply
   3,316.39x = 4,971.48 × 1,123.57
4. Step 4: Simplify right side
   3,316.39x = 5,585,807.78
5. Step 5: Solve for x
   x = 5,585,807.78/3,316.39
6. Step 6: Final answer
   x = 1,684.30