Finding the Fourth Proportional to 2,018.39, 2,782.80 and 1,309.01

Step by Step Solution

1. Step 1: Write the proportion equation
   2,018.39 : 2,782.80 = 1,309.01 : x
2. Step 2: Convert to fraction form
   2,018.39/2,782.80 = 1,309.01/x
3. Step 3: Cross multiply
   2,018.39x = 2,782.80 × 1,309.01
4. Step 4: Simplify right side
   2,018.39x = 3,642,699.11
5. Step 5: Solve for x
   x = 3,642,699.11/2,018.39
6. Step 6: Final answer
   x = 1,804.76