Finding the Fourth Proportional to 3,123.15, 4,684.10 and 1,042.80

Step by Step Solution

1. Step 1: Write the proportion equation
   3,123.15 : 4,684.10 = 1,042.80 : x
2. Step 2: Convert to fraction form
   3,123.15/4,684.10 = 1,042.80/x
3. Step 3: Cross multiply
   3,123.15x = 4,684.10 × 1,042.80
4. Step 4: Simplify right side
   3,123.15x = 4,884,574.27
5. Step 5: Solve for x
   x = 4,884,574.27/3,123.15
6. Step 6: Final answer
   x = 1,563.99