Finding the Fourth Proportional to 1,557.83, 2,150.22 and 920.33

Step by Step Solution

1. Step 1: Write the proportion equation
   1,557.83 : 2,150.22 = 920.33 : x
2. Step 2: Convert to fraction form
   1,557.83/2,150.22 = 920.33/x
3. Step 3: Cross multiply
   1,557.83x = 2,150.22 × 920.33
4. Step 4: Simplify right side
   1,557.83x = 1,978,911.97
5. Step 5: Solve for x
   x = 1,978,911.97/1,557.83
6. Step 6: Final answer
   x = 1,270.30