Finding the Fourth Proportional to 1,223.45, 1,833.56 and 572.82

Step by Step Solution

1. Step 1: Write the proportion equation
   1,223.45 : 1,833.56 = 572.82 : x
2. Step 2: Convert to fraction form
   1,223.45/1,833.56 = 572.82/x
3. Step 3: Cross multiply
   1,223.45x = 1,833.56 × 572.82
4. Step 4: Simplify right side
   1,223.45x = 1,050,296.98
5. Step 5: Solve for x
   x = 1,050,296.98/1,223.45
6. Step 6: Final answer
   x = 858.47