Finding the Fourth Proportional to 1,281.89, 1,922.73 and 357.47

Step by Step Solution

1. Step 1: Write the proportion equation
   1,281.89 : 1,922.73 = 357.47 : x
2. Step 2: Convert to fraction form
   1,281.89/1,922.73 = 357.47/x
3. Step 3: Cross multiply
   1,281.89x = 1,922.73 × 357.47
4. Step 4: Simplify right side
   1,281.89x = 687,314.55
5. Step 5: Solve for x
   x = 687,314.55/1,281.89
6. Step 6: Final answer
   x = 536.17