Finding the Fourth Proportional to 1,068.89, 1,603.82 and 581.21

Step by Step Solution

1. Step 1: Write the proportion equation
   1,068.89 : 1,603.82 = 581.21 : x
2. Step 2: Convert to fraction form
   1,068.89/1,603.82 = 581.21/x
3. Step 3: Cross multiply
   1,068.89x = 1,603.82 × 581.21
4. Step 4: Simplify right side
   1,068.89x = 932,153.32
5. Step 5: Solve for x
   x = 932,153.32/1,068.89
6. Step 6: Final answer
   x = 872.08