Finding the Fourth Proportional to 1,201.37, 1,801.15 and 810.27

Step by Step Solution

1. Step 1: Write the proportion equation
   1,201.37 : 1,801.15 = 810.27 : x
2. Step 2: Convert to fraction form
   1,201.37/1,801.15 = 810.27/x
3. Step 3: Cross multiply
   1,201.37x = 1,801.15 × 810.27
4. Step 4: Simplify right side
   1,201.37x = 1,459,413.31
5. Step 5: Solve for x
   x = 1,459,413.31/1,201.37
6. Step 6: Final answer
   x = 1,214.80