Finding the Fourth Proportional to 1,647.40, 2,273.31 and 901.36

Step by Step Solution

1. Step 1: Write the proportion equation
   1,647.40 : 2,273.31 = 901.36 : x
2. Step 2: Convert to fraction form
   1,647.40/2,273.31 = 901.36/x
3. Step 3: Cross multiply
   1,647.40x = 2,273.31 × 901.36
4. Step 4: Simplify right side
   1,647.40x = 2,049,065.02
5. Step 5: Solve for x
   x = 2,049,065.02/1,647.40
6. Step 6: Final answer
   x = 1,243.82