Finding the Fourth Proportional to 1,413.44, 1,947.84 and 998.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,413.44 : 1,947.84 = 998.72 : x
2. Step 2: Convert to fraction form
   1,413.44/1,947.84 = 998.72/x
3. Step 3: Cross multiply
   1,413.44x = 1,947.84 × 998.72
4. Step 4: Simplify right side
   1,413.44x = 1,945,346.76
5. Step 5: Solve for x
   x = 1,945,346.76/1,413.44
6. Step 6: Final answer
   x = 1,376.32