Finding the Fourth Proportional to 1,155.55, 1,733.91 and 578.38

Step by Step Solution

1. Step 1: Write the proportion equation
   1,155.55 : 1,733.91 = 578.38 : x
2. Step 2: Convert to fraction form
   1,155.55/1,733.91 = 578.38/x
3. Step 3: Cross multiply
   1,155.55x = 1,733.91 × 578.38
4. Step 4: Simplify right side
   1,155.55x = 1,002,847.30
5. Step 5: Solve for x
   x = 1,002,847.30/1,155.55
6. Step 6: Final answer
   x = 867.86