Finding the Fourth Proportional to 1,878.40, 2,814.52 and 1,806.39

Step by Step Solution

1. Step 1: Write the proportion equation
   1,878.40 : 2,814.52 = 1,806.39 : x
2. Step 2: Convert to fraction form
   1,878.40/2,814.52 = 1,806.39/x
3. Step 3: Cross multiply
   1,878.40x = 2,814.52 × 1,806.39
4. Step 4: Simplify right side
   1,878.40x = 5,084,134.72
5. Step 5: Solve for x
   x = 5,084,134.72/1,878.40
6. Step 6: Final answer
   x = 2,706.63