Finding the Fourth Proportional to 1,550.21, 2,321.47 and 1,085.81

Step by Step Solution

1. Step 1: Write the proportion equation
   1,550.21 : 2,321.47 = 1,085.81 : x
2. Step 2: Convert to fraction form
   1,550.21/2,321.47 = 1,085.81/x
3. Step 3: Cross multiply
   1,550.21x = 2,321.47 × 1,085.81
4. Step 4: Simplify right side
   1,550.21x = 2,520,675.34
5. Step 5: Solve for x
   x = 2,520,675.34/1,550.21
6. Step 6: Final answer
   x = 1,626.02