Finding the Fourth Proportional to 1,558.33, 2,150.31 and 886.15

Step by Step Solution

1. Step 1: Write the proportion equation
   1,558.33 : 2,150.31 = 886.15 : x
2. Step 2: Convert to fraction form
   1,558.33/2,150.31 = 886.15/x
3. Step 3: Cross multiply
   1,558.33x = 2,150.31 × 886.15
4. Step 4: Simplify right side
   1,558.33x = 1,905,497.21
5. Step 5: Solve for x
   x = 1,905,497.21/1,558.33
6. Step 6: Final answer
   x = 1,222.78