Finding the Fourth Proportional to 1,807.69, 2,494.41 and 1,021.74

Step by Step Solution

1. Step 1: Write the proportion equation
   1,807.69 : 2,494.41 = 1,021.74 : x
2. Step 2: Convert to fraction form
   1,807.69/2,494.41 = 1,021.74/x
3. Step 3: Cross multiply
   1,807.69x = 2,494.41 × 1,021.74
4. Step 4: Simplify right side
   1,807.69x = 2,548,638.47
5. Step 5: Solve for x
   x = 2,548,638.47/1,807.69
6. Step 6: Final answer
   x = 1,409.89