Finding the Fourth Proportional to 2,109.05, 2,910.47 and 1,164.90

Step by Step Solution

1. Step 1: Write the proportion equation
   2,109.05 : 2,910.47 = 1,164.90 : x
2. Step 2: Convert to fraction form
   2,109.05/2,910.47 = 1,164.90/x
3. Step 3: Cross multiply
   2,109.05x = 2,910.47 × 1,164.90
4. Step 4: Simplify right side
   2,109.05x = 3,390,413.24
5. Step 5: Solve for x
   x = 3,390,413.24/2,109.05
6. Step 6: Final answer
   x = 1,607.56