Finding the Fourth Proportional to 1,056.32, 1,458.24 and 819.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,056.32 : 1,458.24 = 819.72 : x
2. Step 2: Convert to fraction form
   1,056.32/1,458.24 = 819.72/x
3. Step 3: Cross multiply
   1,056.32x = 1,458.24 × 819.72
4. Step 4: Simplify right side
   1,056.32x = 1,195,348.49
5. Step 5: Solve for x
   x = 1,195,348.49/1,056.32
6. Step 6: Final answer
   x = 1,131.62