Finding the Fourth Proportional to 1,550.72, 2,139.48 and 887.33

Step by Step Solution

1. Step 1: Write the proportion equation
   1,550.72 : 2,139.48 = 887.33 : x
2. Step 2: Convert to fraction form
   1,550.72/2,139.48 = 887.33/x
3. Step 3: Cross multiply
   1,550.72x = 2,139.48 × 887.33
4. Step 4: Simplify right side
   1,550.72x = 1,898,414.09
5. Step 5: Solve for x
   x = 1,898,414.09/1,550.72
6. Step 6: Final answer
   x = 1,224.22