Finding the Fourth Proportional to 1,990.71, 2,747.31 and 1,106.61

Step by Step Solution

1. Step 1: Write the proportion equation
   1,990.71 : 2,747.31 = 1,106.61 : x
2. Step 2: Convert to fraction form
   1,990.71/2,747.31 = 1,106.61/x
3. Step 3: Cross multiply
   1,990.71x = 2,747.31 × 1,106.61
4. Step 4: Simplify right side
   1,990.71x = 3,040,200.72
5. Step 5: Solve for x
   x = 3,040,200.72/1,990.71
6. Step 6: Final answer
   x = 1,527.19