Finding the Fourth Proportional to 1,990.96, 2,985.51 and 1,066.30

Step by Step Solution

1. Step 1: Write the proportion equation
   1,990.96 : 2,985.51 = 1,066.30 : x
2. Step 2: Convert to fraction form
   1,990.96/2,985.51 = 1,066.30/x
3. Step 3: Cross multiply
   1,990.96x = 2,985.51 × 1,066.30
4. Step 4: Simplify right side
   1,990.96x = 3,183,449.31
5. Step 5: Solve for x
   x = 3,183,449.31/1,990.96
6. Step 6: Final answer
   x = 1,598.95