Finding the Fourth Proportional to 1,443.83, 2,166.12 and 470.21

Step by Step Solution

1. Step 1: Write the proportion equation
   1,443.83 : 2,166.12 = 470.21 : x
2. Step 2: Convert to fraction form
   1,443.83/2,166.12 = 470.21/x
3. Step 3: Cross multiply
   1,443.83x = 2,166.12 × 470.21
4. Step 4: Simplify right side
   1,443.83x = 1,018,520.45
5. Step 5: Solve for x
   x = 1,018,520.45/1,443.83
6. Step 6: Final answer
   x = 705.43