Finding the Fourth Proportional to 1,807.50, 2,494.32 and 1,021.56

Step by Step Solution

1. Step 1: Write the proportion equation
   1,807.50 : 2,494.32 = 1,021.56 : x
2. Step 2: Convert to fraction form
   1,807.50/2,494.32 = 1,021.56/x
3. Step 3: Cross multiply
   1,807.50x = 2,494.32 × 1,021.56
4. Step 4: Simplify right side
   1,807.50x = 2,548,097.54
5. Step 5: Solve for x
   x = 2,548,097.54/1,807.50
6. Step 6: Final answer
   x = 1,409.74