Finding the Fourth Proportional to 1,447.31, 1,997.21 and 849.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,447.31 : 1,997.21 = 849.72 : x
2. Step 2: Convert to fraction form
   1,447.31/1,997.21 = 849.72/x
3. Step 3: Cross multiply
   1,447.31x = 1,997.21 × 849.72
4. Step 4: Simplify right side
   1,447.31x = 1,697,065.03
5. Step 5: Solve for x
   x = 1,697,065.03/1,447.31
6. Step 6: Final answer
   x = 1,172.56