Finding the Fourth Proportional to 1,352.25, 1,866.12 and 887.31

Step by Step Solution

1. Step 1: Write the proportion equation
   1,352.25 : 1,866.12 = 887.31 : x
2. Step 2: Convert to fraction form
   1,352.25/1,866.12 = 887.31/x
3. Step 3: Cross multiply
   1,352.25x = 1,866.12 × 887.31
4. Step 4: Simplify right side
   1,352.25x = 1,655,826.94
5. Step 5: Solve for x
   x = 1,655,826.94/1,352.25
6. Step 6: Final answer
   x = 1,224.50