Finding the Fourth Proportional to 1,558.77, 2,150.56 and 886.50

Step by Step Solution

1. Step 1: Write the proportion equation
   1,558.77 : 2,150.56 = 886.50 : x
2. Step 2: Convert to fraction form
   1,558.77/2,150.56 = 886.50/x
3. Step 3: Cross multiply
   1,558.77x = 2,150.56 × 886.50
4. Step 4: Simplify right side
   1,558.77x = 1,906,471.44
5. Step 5: Solve for x
   x = 1,906,471.44/1,558.77
6. Step 6: Final answer
   x = 1,223.07