Finding the Fourth Proportional to 1,483.39, 2,221.89 and 866.49

Step by Step Solution

1. Step 1: Write the proportion equation
   1,483.39 : 2,221.89 = 866.49 : x
2. Step 2: Convert to fraction form
   1,483.39/2,221.89 = 866.49/x
3. Step 3: Cross multiply
   1,483.39x = 2,221.89 × 866.49
4. Step 4: Simplify right side
   1,483.39x = 1,925,245.47
5. Step 5: Solve for x
   x = 1,925,245.47/1,483.39
6. Step 6: Final answer
   x = 1,297.87