Finding the Fourth Proportional to 1,413.58, 2,119.89 and 719.98

Step by Step Solution

1. Step 1: Write the proportion equation
   1,413.58 : 2,119.89 = 719.98 : x
2. Step 2: Convert to fraction form
   1,413.58/2,119.89 = 719.98/x
3. Step 3: Cross multiply
   1,413.58x = 2,119.89 × 719.98
4. Step 4: Simplify right side
   1,413.58x = 1,526,278.40
5. Step 5: Solve for x
   x = 1,526,278.40/1,413.58
6. Step 6: Final answer
   x = 1,079.73