Finding the Fourth Proportional to 1,550.83, 2,139.91 and 887.56

Step by Step Solution

1. Step 1: Write the proportion equation
   1,550.83 : 2,139.91 = 887.56 : x
2. Step 2: Convert to fraction form
   1,550.83/2,139.91 = 887.56/x
3. Step 3: Cross multiply
   1,550.83x = 2,139.91 × 887.56
4. Step 4: Simplify right side
   1,550.83x = 1,899,293.45
5. Step 5: Solve for x
   x = 1,899,293.45/1,550.83
6. Step 6: Final answer
   x = 1,224.70