Finding the Fourth Proportional to 1,921.81, 2,884.42 and 998.00

Step by Step Solution

1. Step 1: Write the proportion equation
   1,921.81 : 2,884.42 = 998.00 : x
2. Step 2: Convert to fraction form
   1,921.81/2,884.42 = 998.00/x
3. Step 3: Cross multiply
   1,921.81x = 2,884.42 × 998.00
4. Step 4: Simplify right side
   1,921.81x = 2,878,665.03
5. Step 5: Solve for x
   x = 2,878,665.03/1,921.81
6. Step 6: Final answer
   x = 1,497.89