Finding the Fourth Proportional to 1,157.56, 1,734.72 and 832.21

Step by Step Solution

1. Step 1: Write the proportion equation
   1,157.56 : 1,734.72 = 832.21 : x
2. Step 2: Convert to fraction form
   1,157.56/1,734.72 = 832.21/x
3. Step 3: Cross multiply
   1,157.56x = 1,734.72 × 832.21
4. Step 4: Simplify right side
   1,157.56x = 1,443,651.33
5. Step 5: Solve for x
   x = 1,443,651.33/1,157.56
6. Step 6: Final answer
   x = 1,247.15