Finding the Fourth Proportional to 1,353.06, 1,866.33 and 886.50

Step by Step Solution

1. Step 1: Write the proportion equation
   1,353.06 : 1,866.33 = 886.50 : x
2. Step 2: Convert to fraction form
   1,353.06/1,866.33 = 886.50/x
3. Step 3: Cross multiply
   1,353.06x = 1,866.33 × 886.50
4. Step 4: Simplify right side
   1,353.06x = 1,654,501.55
5. Step 5: Solve for x
   x = 1,654,501.55/1,353.06
6. Step 6: Final answer
   x = 1,222.79