Finding the Fourth Proportional to 1,100.85, 1,649.52 and 580.83

Step by Step Solution

1. Step 1: Write the proportion equation
   1,100.85 : 1,649.52 = 580.83 : x
2. Step 2: Convert to fraction form
   1,100.85/1,649.52 = 580.83/x
3. Step 3: Cross multiply
   1,100.85x = 1,649.52 × 580.83
4. Step 4: Simplify right side
   1,100.85x = 958,090.70
5. Step 5: Solve for x
   x = 958,090.70/1,100.85
6. Step 6: Final answer
   x = 870.32