Finding the Fourth Proportional to 1,558.05, 2,150.28 and 886.01

Step by Step Solution

1. Step 1: Write the proportion equation
   1,558.05 : 2,150.28 = 886.01 : x
2. Step 2: Convert to fraction form
   1,558.05/2,150.28 = 886.01/x
3. Step 3: Cross multiply
   1,558.05x = 2,150.28 × 886.01
4. Step 4: Simplify right side
   1,558.05x = 1,905,158.83
5. Step 5: Solve for x
   x = 1,905,158.83/1,558.05
6. Step 6: Final answer
   x = 1,222.79