Finding the Fourth Proportional to 1,222.17, 1,833.49 and 572.91

Step by Step Solution

1. Step 1: Write the proportion equation
   1,222.17 : 1,833.49 = 572.91 : x
2. Step 2: Convert to fraction form
   1,222.17/1,833.49 = 572.91/x
3. Step 3: Cross multiply
   1,222.17x = 1,833.49 × 572.91
4. Step 4: Simplify right side
   1,222.17x = 1,050,415.37
5. Step 5: Solve for x
   x = 1,050,415.37/1,222.17
6. Step 6: Final answer
   x = 859.47