Finding the Fourth Proportional to 1,624.83, 2,243.25 and 1,290.09

Step by Step Solution

1. Step 1: Write the proportion equation
   1,624.83 : 2,243.25 = 1,290.09 : x
2. Step 2: Convert to fraction form
   1,624.83/2,243.25 = 1,290.09/x
3. Step 3: Cross multiply
   1,624.83x = 2,243.25 × 1,290.09
4. Step 4: Simplify right side
   1,624.83x = 2,893,994.39
5. Step 5: Solve for x
   x = 2,893,994.39/1,624.83
6. Step 6: Final answer
   x = 1,781.11