Finding the Fourth Proportional to 1,042.63, 1,562.72 and 580.18

Step by Step Solution

1. Step 1: Write the proportion equation
   1,042.63 : 1,562.72 = 580.18 : x
2. Step 2: Convert to fraction form
   1,042.63/1,562.72 = 580.18/x
3. Step 3: Cross multiply
   1,042.63x = 1,562.72 × 580.18
4. Step 4: Simplify right side
   1,042.63x = 906,658.89
5. Step 5: Solve for x
   x = 906,658.89/1,042.63
6. Step 6: Final answer
   x = 869.59