Finding the Fourth Proportional to 1,411.01, 1,947.20 and 821.73

Step by Step Solution

1. Step 1: Write the proportion equation
   1,411.01 : 1,947.20 = 821.73 : x
2. Step 2: Convert to fraction form
   1,411.01/1,947.20 = 821.73/x
3. Step 3: Cross multiply
   1,411.01x = 1,947.20 × 821.73
4. Step 4: Simplify right side
   1,411.01x = 1,600,072.66
5. Step 5: Solve for x
   x = 1,600,072.66/1,411.01
6. Step 6: Final answer
   x = 1,133.99