Finding the Fourth Proportional to 1,550.56, 2,139.83 and 887.43

Step by Step Solution

1. Step 1: Write the proportion equation
   1,550.56 : 2,139.83 = 887.43 : x
2. Step 2: Convert to fraction form
   1,550.56/2,139.83 = 887.43/x
3. Step 3: Cross multiply
   1,550.56x = 2,139.83 × 887.43
4. Step 4: Simplify right side
   1,550.56x = 1,898,949.34
5. Step 5: Solve for x
   x = 1,898,949.34/1,550.56
6. Step 6: Final answer
   x = 1,224.69