Finding the Fourth Proportional to 1,550.88, 2,139.54 and 887.58

Step by Step Solution

1. Step 1: Write the proportion equation
   1,550.88 : 2,139.54 = 887.58 : x
2. Step 2: Convert to fraction form
   1,550.88/2,139.54 = 887.58/x
3. Step 3: Cross multiply
   1,550.88x = 2,139.54 × 887.58
4. Step 4: Simplify right side
   1,550.88x = 1,899,012.91
5. Step 5: Solve for x
   x = 1,899,012.91/1,550.88
6. Step 6: Final answer
   x = 1,224.47