Finding the Fourth Proportional to 1,807.56, 2,494.50 and 1,021.56

Step by Step Solution

1. Step 1: Write the proportion equation
   1,807.56 : 2,494.50 = 1,021.56 : x
2. Step 2: Convert to fraction form
   1,807.56/2,494.50 = 1,021.56/x
3. Step 3: Cross multiply
   1,807.56x = 2,494.50 × 1,021.56
4. Step 4: Simplify right side
   1,807.56x = 2,548,281.42
5. Step 5: Solve for x
   x = 2,548,281.42/1,807.56
6. Step 6: Final answer
   x = 1,409.79