Finding the Fourth Proportional to 3,138.72, 4,706.22 and 1,191.06

Step by Step Solution

1. Step 1: Write the proportion equation
   3,138.72 : 4,706.22 = 1,191.06 : x
2. Step 2: Convert to fraction form
   3,138.72/4,706.22 = 1,191.06/x
3. Step 3: Cross multiply
   3,138.72x = 4,706.22 × 1,191.06
4. Step 4: Simplify right side
   3,138.72x = 5,605,390.39
5. Step 5: Solve for x
   x = 5,605,390.39/3,138.72
6. Step 6: Final answer
   x = 1,785.88