Finding the Fourth Proportional to 1,604.31, 2,213.02 and 1,013.82

Step by Step Solution

1. Step 1: Write the proportion equation
   1,604.31 : 2,213.02 = 1,013.82 : x
2. Step 2: Convert to fraction form
   1,604.31/2,213.02 = 1,013.82/x
3. Step 3: Cross multiply
   1,604.31x = 2,213.02 × 1,013.82
4. Step 4: Simplify right side
   1,604.31x = 2,243,603.94
5. Step 5: Solve for x
   x = 2,243,603.94/1,604.31
6. Step 6: Final answer
   x = 1,398.49