Finding the Fourth Proportional to 2,111.38, 3,160.18 and 1,909.29

Step by Step Solution

1. Step 1: Write the proportion equation
   2,111.38 : 3,160.18 = 1,909.29 : x
2. Step 2: Convert to fraction form
   2,111.38/3,160.18 = 1,909.29/x
3. Step 3: Cross multiply
   2,111.38x = 3,160.18 × 1,909.29
4. Step 4: Simplify right side
   2,111.38x = 6,033,700.07
5. Step 5: Solve for x
   x = 6,033,700.07/2,111.38
6. Step 6: Final answer
   x = 2,857.70