Finding the Fourth Proportional to 1,591.47, 2,196.20 and 883.31

Step by Step Solution

1. Step 1: Write the proportion equation
   1,591.47 : 2,196.20 = 883.31 : x
2. Step 2: Convert to fraction form
   1,591.47/2,196.20 = 883.31/x
3. Step 3: Cross multiply
   1,591.47x = 2,196.20 × 883.31
4. Step 4: Simplify right side
   1,591.47x = 1,939,933.12
5. Step 5: Solve for x
   x = 1,939,933.12/1,591.47
6. Step 6: Final answer
   x = 1,218.96