Finding the Fourth Proportional to 1,449.56, 2,172.54 and 824.83

Step by Step Solution

1. Step 1: Write the proportion equation
   1,449.56 : 2,172.54 = 824.83 : x
2. Step 2: Convert to fraction form
   1,449.56/2,172.54 = 824.83/x
3. Step 3: Cross multiply
   1,449.56x = 2,172.54 × 824.83
4. Step 4: Simplify right side
   1,449.56x = 1,791,965.31
5. Step 5: Solve for x
   x = 1,791,965.31/1,449.56
6. Step 6: Final answer
   x = 1,236.21