Finding the Fourth Proportional to 1,990.21, 2,746.37 and 1,105.98

Step by Step Solution

1. Step 1: Write the proportion equation
   1,990.21 : 2,746.37 = 1,105.98 : x
2. Step 2: Convert to fraction form
   1,990.21/2,746.37 = 1,105.98/x
3. Step 3: Cross multiply
   1,990.21x = 2,746.37 × 1,105.98
4. Step 4: Simplify right side
   1,990.21x = 3,037,424.76
5. Step 5: Solve for x
   x = 3,037,424.76/1,990.21
6. Step 6: Final answer
   x = 1,526.19