Finding the Fourth Proportional to 1,413.72, 2,121.72 and 974.70

Step by Step Solution

1. Step 1: Write the proportion equation
   1,413.72 : 2,121.72 = 974.70 : x
2. Step 2: Convert to fraction form
   1,413.72/2,121.72 = 974.70/x
3. Step 3: Cross multiply
   1,413.72x = 2,121.72 × 974.70
4. Step 4: Simplify right side
   1,413.72x = 2,068,040.48
5. Step 5: Solve for x
   x = 2,068,040.48/1,413.72
6. Step 6: Final answer
   x = 1,462.84