Finding the Fourth Proportional to 1,448.72, 2,172.03 and 832.31

Step by Step Solution

1. Step 1: Write the proportion equation
   1,448.72 : 2,172.03 = 832.31 : x
2. Step 2: Convert to fraction form
   1,448.72/2,172.03 = 832.31/x
3. Step 3: Cross multiply
   1,448.72x = 2,172.03 × 832.31
4. Step 4: Simplify right side
   1,448.72x = 1,807,802.29
5. Step 5: Solve for x
   x = 1,807,802.29/1,448.72
6. Step 6: Final answer
   x = 1,247.86