Finding the Fourth Proportional to 1,550.36, 2,139.59 and 887.42

Step by Step Solution

1. Step 1: Write the proportion equation
   1,550.36 : 2,139.59 = 887.42 : x
2. Step 2: Convert to fraction form
   1,550.36/2,139.59 = 887.42/x
3. Step 3: Cross multiply
   1,550.36x = 2,139.59 × 887.42
4. Step 4: Simplify right side
   1,550.36x = 1,898,706.48
5. Step 5: Solve for x
   x = 1,898,706.48/1,550.36
6. Step 6: Final answer
   x = 1,224.69