Finding the Fourth Proportional to 2,090.67, 2,884.05 and 1,392.18

Step by Step Solution

1. Step 1: Write the proportion equation
   2,090.67 : 2,884.05 = 1,392.18 : x
2. Step 2: Convert to fraction form
   2,090.67/2,884.05 = 1,392.18/x
3. Step 3: Cross multiply
   2,090.67x = 2,884.05 × 1,392.18
4. Step 4: Simplify right side
   2,090.67x = 4,015,116.73
5. Step 5: Solve for x
   x = 4,015,116.73/2,090.67
6. Step 6: Final answer
   x = 1,920.49