Finding the Fourth Proportional to 1,550.67, 2,139.98 and 887.47

Step by Step Solution

1. Step 1: Write the proportion equation
   1,550.67 : 2,139.98 = 887.47 : x
2. Step 2: Convert to fraction form
   1,550.67/2,139.98 = 887.47/x
3. Step 3: Cross multiply
   1,550.67x = 2,139.98 × 887.47
4. Step 4: Simplify right side
   1,550.67x = 1,899,163.61
5. Step 5: Solve for x
   x = 1,899,163.61/1,550.67
6. Step 6: Final answer
   x = 1,224.74