Finding the Fourth Proportional to 3,190.98, 4,785.54 and 1,242.72

Step by Step Solution

1. Step 1: Write the proportion equation
   3,190.98 : 4,785.54 = 1,242.72 : x
2. Step 2: Convert to fraction form
   3,190.98/4,785.54 = 1,242.72/x
3. Step 3: Cross multiply
   3,190.98x = 4,785.54 × 1,242.72
4. Step 4: Simplify right side
   3,190.98x = 5,947,086.27
5. Step 5: Solve for x
   x = 5,947,086.27/3,190.98
6. Step 6: Final answer
   x = 1,863.72