Finding the Fourth Proportional to 2,123.50, 3,169.48 and 1,809.12

Step by Step Solution

1. Step 1: Write the proportion equation
   2,123.50 : 3,169.48 = 1,809.12 : x
2. Step 2: Convert to fraction form
   2,123.50/3,169.48 = 1,809.12/x
3. Step 3: Cross multiply
   2,123.50x = 3,169.48 × 1,809.12
4. Step 4: Simplify right side
   2,123.50x = 5,733,969.66
5. Step 5: Solve for x
   x = 5,733,969.66/2,123.50
6. Step 6: Final answer
   x = 2,700.24