Finding the Fourth Proportional to 1,060.56, 1,590.82 and 411.42

Step by Step Solution

1. Step 1: Write the proportion equation
   1,060.56 : 1,590.82 = 411.42 : x
2. Step 2: Convert to fraction form
   1,060.56/1,590.82 = 411.42/x
3. Step 3: Cross multiply
   1,060.56x = 1,590.82 × 411.42
4. Step 4: Simplify right side
   1,060.56x = 654,495.16
5. Step 5: Solve for x
   x = 654,495.16/1,060.56
6. Step 6: Final answer
   x = 617.12