Finding the Fourth Proportional to 1,339.45, 1,846.77 and 866.54

Step by Step Solution

1. Step 1: Write the proportion equation
   1,339.45 : 1,846.77 = 866.54 : x
2. Step 2: Convert to fraction form
   1,339.45/1,846.77 = 866.54/x
3. Step 3: Cross multiply
   1,339.45x = 1,846.77 × 866.54
4. Step 4: Simplify right side
   1,339.45x = 1,600,300.08
5. Step 5: Solve for x
   x = 1,600,300.08/1,339.45
6. Step 6: Final answer
   x = 1,194.74