Finding the Fourth Proportional to 1,607.21, 2,413.43 and 994.82

Step by Step Solution

1. Step 1: Write the proportion equation
   1,607.21 : 2,413.43 = 994.82 : x
2. Step 2: Convert to fraction form
   1,607.21/2,413.43 = 994.82/x
3. Step 3: Cross multiply
   1,607.21x = 2,413.43 × 994.82
4. Step 4: Simplify right side
   1,607.21x = 2,400,915.12
5. Step 5: Solve for x
   x = 2,400,915.12/1,607.21
6. Step 6: Final answer
   x = 1,493.84