Finding the Fourth Proportional to 1,212.82, 1,819.56 and 555.12

Step by Step Solution

1. Step 1: Write the proportion equation
   1,212.82 : 1,819.56 = 555.12 : x
2. Step 2: Convert to fraction form
   1,212.82/1,819.56 = 555.12/x
3. Step 3: Cross multiply
   1,212.82x = 1,819.56 × 555.12
4. Step 4: Simplify right side
   1,212.82x = 1,010,076.23
5. Step 5: Solve for x
   x = 1,010,076.23/1,212.82
6. Step 6: Final answer
   x = 832.83