Finding the Fourth Proportional to 1,357.95, 1,873.68 and 1,022.21

Step by Step Solution

1. Step 1: Write the proportion equation
   1,357.95 : 1,873.68 = 1,022.21 : x
2. Step 2: Convert to fraction form
   1,357.95/1,873.68 = 1,022.21/x
3. Step 3: Cross multiply
   1,357.95x = 1,873.68 × 1,022.21
4. Step 4: Simplify right side
   1,357.95x = 1,915,294.01
5. Step 5: Solve for x
   x = 1,915,294.01/1,357.95
6. Step 6: Final answer
   x = 1,410.43