Finding the Fourth Proportional to 1,082.32, 1,624.72 and 821.68

Step by Step Solution

1. Step 1: Write the proportion equation
   1,082.32 : 1,624.72 = 821.68 : x
2. Step 2: Convert to fraction form
   1,082.32/1,624.72 = 821.68/x
3. Step 3: Cross multiply
   1,082.32x = 1,624.72 × 821.68
4. Step 4: Simplify right side
   1,082.32x = 1,334,999.93
5. Step 5: Solve for x
   x = 1,334,999.93/1,082.32
6. Step 6: Final answer
   x = 1,233.46