Finding the Fourth Proportional to 1,992.54, 2,989.18 and 821.89

Step by Step Solution

1. Step 1: Write the proportion equation
   1,992.54 : 2,989.18 = 821.89 : x
2. Step 2: Convert to fraction form
   1,992.54/2,989.18 = 821.89/x
3. Step 3: Cross multiply
   1,992.54x = 2,989.18 × 821.89
4. Step 4: Simplify right side
   1,992.54x = 2,456,777.15
5. Step 5: Solve for x
   x = 2,456,777.15/1,992.54
6. Step 6: Final answer
   x = 1,232.99