Finding the Fourth Proportional to 1,355.82, 1,872.36 and 1,158.18

Step by Step Solution

1. Step 1: Write the proportion equation
   1,355.82 : 1,872.36 = 1,158.18 : x
2. Step 2: Convert to fraction form
   1,355.82/1,872.36 = 1,158.18/x
3. Step 3: Cross multiply
   1,355.82x = 1,872.36 × 1,158.18
4. Step 4: Simplify right side
   1,355.82x = 2,168,529.90
5. Step 5: Solve for x
   x = 2,168,529.90/1,355.82
6. Step 6: Final answer
   x = 1,599.42