Finding the Fourth Proportional to 1,483.31, 2,221.61 and 866.09

Step by Step Solution

1. Step 1: Write the proportion equation
   1,483.31 : 2,221.61 = 866.09 : x
2. Step 2: Convert to fraction form
   1,483.31/2,221.61 = 866.09/x
3. Step 3: Cross multiply
   1,483.31x = 2,221.61 × 866.09
4. Step 4: Simplify right side
   1,483.31x = 1,924,098.77
5. Step 5: Solve for x
   x = 1,924,098.77/1,483.31
6. Step 6: Final answer
   x = 1,297.17