Finding the Fourth Proportional to 1,443.06, 2,164.50 and 417.06

Step by Step Solution

1. Step 1: Write the proportion equation
   1,443.06 : 2,164.50 = 417.06 : x
2. Step 2: Convert to fraction form
   1,443.06/2,164.50 = 417.06/x
3. Step 3: Cross multiply
   1,443.06x = 2,164.50 × 417.06
4. Step 4: Simplify right side
   1,443.06x = 902,726.37
5. Step 5: Solve for x
   x = 902,726.37/1,443.06
6. Step 6: Final answer
   x = 625.56