Finding the Fourth Proportional to 1,990.40, 2,746.56 and 1,150.76

Step by Step Solution

1. Step 1: Write the proportion equation
   1,990.40 : 2,746.56 = 1,150.76 : x
2. Step 2: Convert to fraction form
   1,990.40/2,746.56 = 1,150.76/x
3. Step 3: Cross multiply
   1,990.40x = 2,746.56 × 1,150.76
4. Step 4: Simplify right side
   1,990.40x = 3,160,631.39
5. Step 5: Solve for x
   x = 3,160,631.39/1,990.40
6. Step 6: Final answer
   x = 1,587.94