Finding the Fourth Proportional to 1,990.56, 2,747.03 and 1,308.94

Step by Step Solution

1. Step 1: Write the proportion equation
   1,990.56 : 2,747.03 = 1,308.94 : x
2. Step 2: Convert to fraction form
   1,990.56/2,747.03 = 1,308.94/x
3. Step 3: Cross multiply
   1,990.56x = 2,747.03 × 1,308.94
4. Step 4: Simplify right side
   1,990.56x = 3,595,697.45
5. Step 5: Solve for x
   x = 3,595,697.45/1,990.56
6. Step 6: Final answer
   x = 1,806.37