Finding the Fourth Proportional to 1,550.63, 2,139.86 and 887.48

Step by Step Solution

1. Step 1: Write the proportion equation
   1,550.63 : 2,139.86 = 887.48 : x
2. Step 2: Convert to fraction form
   1,550.63/2,139.86 = 887.48/x
3. Step 3: Cross multiply
   1,550.63x = 2,139.86 × 887.48
4. Step 4: Simplify right side
   1,550.63x = 1,899,074.47
5. Step 5: Solve for x
   x = 1,899,074.47/1,550.63
6. Step 6: Final answer
   x = 1,224.71