Finding the Fourth Proportional to 2,123.89, 3,168.80 and 1,812.18

Step by Step Solution

1. Step 1: Write the proportion equation
   2,123.89 : 3,168.80 = 1,812.18 : x
2. Step 2: Convert to fraction form
   2,123.89/3,168.80 = 1,812.18/x
3. Step 3: Cross multiply
   2,123.89x = 3,168.80 × 1,812.18
4. Step 4: Simplify right side
   2,123.89x = 5,742,435.98
5. Step 5: Solve for x
   x = 5,742,435.98/2,123.89
6. Step 6: Final answer
   x = 2,703.74