Finding the Fourth Proportional to 1,844.78, 2,779.56 and 1,645.81

Step by Step Solution

1. Step 1: Write the proportion equation
   1,844.78 : 2,779.56 = 1,645.81 : x
2. Step 2: Convert to fraction form
   1,844.78/2,779.56 = 1,645.81/x
3. Step 3: Cross multiply
   1,844.78x = 2,779.56 × 1,645.81
4. Step 4: Simplify right side
   1,844.78x = 4,574,620.69
5. Step 5: Solve for x
   x = 4,574,620.69/1,844.78
6. Step 6: Final answer
   x = 2,479.77