Finding the Fourth Proportional to 1,550.62, 2,139.78 and 887.48

Step by Step Solution

1. Step 1: Write the proportion equation
   1,550.62 : 2,139.78 = 887.48 : x
2. Step 2: Convert to fraction form
   1,550.62/2,139.78 = 887.48/x
3. Step 3: Cross multiply
   1,550.62x = 2,139.78 × 887.48
4. Step 4: Simplify right side
   1,550.62x = 1,899,011.95
5. Step 5: Solve for x
   x = 1,899,011.95/1,550.62
6. Step 6: Final answer
   x = 1,224.68