Finding the Fourth Proportional to 1,413.06, 1,945.26 and 1,215.42

Step by Step Solution

1. Step 1: Write the proportion equation
   1,413.06 : 1,945.26 = 1,215.42 : x
2. Step 2: Convert to fraction form
   1,413.06/1,945.26 = 1,215.42/x
3. Step 3: Cross multiply
   1,413.06x = 1,945.26 × 1,215.42
4. Step 4: Simplify right side
   1,413.06x = 2,364,307.91
5. Step 5: Solve for x
   x = 2,364,307.91/1,413.06
6. Step 6: Final answer
   x = 1,673.18