Finding the Fourth Proportional to 1,445.56, 2,166.30 and 828.34

Step by Step Solution

1. Step 1: Write the proportion equation
   1,445.56 : 2,166.30 = 828.34 : x
2. Step 2: Convert to fraction form
   1,445.56/2,166.30 = 828.34/x
3. Step 3: Cross multiply
   1,445.56x = 2,166.30 × 828.34
4. Step 4: Simplify right side
   1,445.56x = 1,794,432.94
5. Step 5: Solve for x
   x = 1,794,432.94/1,445.56
6. Step 6: Final answer
   x = 1,241.34