Finding the Fourth Proportional to 1,062.04, 1,590.72 and 830.56

Step by Step Solution

1. Step 1: Write the proportion equation
   1,062.04 : 1,590.72 = 830.56 : x
2. Step 2: Convert to fraction form
   1,062.04/1,590.72 = 830.56/x
3. Step 3: Cross multiply
   1,062.04x = 1,590.72 × 830.56
4. Step 4: Simplify right side
   1,062.04x = 1,321,188.40
5. Step 5: Solve for x
   x = 1,321,188.40/1,062.04
6. Step 6: Final answer
   x = 1,244.01