Finding the Fourth Proportional to 2,062.72, 3,091.20 and 1,138.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,062.72 : 3,091.20 = 1,138.72 : x
2. Step 2: Convert to fraction form
   2,062.72/3,091.20 = 1,138.72/x
3. Step 3: Cross multiply
   2,062.72x = 3,091.20 × 1,138.72
4. Step 4: Simplify right side
   2,062.72x = 3,520,011.26
5. Step 5: Solve for x
   x = 3,520,011.26/2,062.72
6. Step 6: Final answer
   x = 1,706.49