Finding the Fourth Proportional to 1,345.12, 1,855.24 and 1,179.05

Step by Step Solution

1. Step 1: Write the proportion equation
   1,345.12 : 1,855.24 = 1,179.05 : x
2. Step 2: Convert to fraction form
   1,345.12/1,855.24 = 1,179.05/x
3. Step 3: Cross multiply
   1,345.12x = 1,855.24 × 1,179.05
4. Step 4: Simplify right side
   1,345.12x = 2,187,413.72
5. Step 5: Solve for x
   x = 2,187,413.72/1,345.12
6. Step 6: Final answer
   x = 1,626.18