Finding the Fourth Proportional to 1,638.04, 2,260.39 and 892.00

Step by Step Solution

1. Step 1: Write the proportion equation
   1,638.04 : 2,260.39 = 892.00 : x
2. Step 2: Convert to fraction form
   1,638.04/2,260.39 = 892.00/x
3. Step 3: Cross multiply
   1,638.04x = 2,260.39 × 892.00
4. Step 4: Simplify right side
   1,638.04x = 2,016,257.43
5. Step 5: Solve for x
   x = 2,016,257.43/1,638.04
6. Step 6: Final answer
   x = 1,230.90