Finding the Fourth Proportional to 1,090.77, 1,636.83 and 441.50

Step by Step Solution

1. Step 1: Write the proportion equation
   1,090.77 : 1,636.83 = 441.50 : x
2. Step 2: Convert to fraction form
   1,090.77/1,636.83 = 441.50/x
3. Step 3: Cross multiply
   1,090.77x = 1,636.83 × 441.50
4. Step 4: Simplify right side
   1,090.77x = 722,662.71
5. Step 5: Solve for x
   x = 722,662.71/1,090.77
6. Step 6: Final answer
   x = 662.53