Finding the Fourth Proportional to 2,619.93, 3,612.54 and 2,021.07

Step by Step Solution

1. Step 1: Write the proportion equation
   2,619.93 : 3,612.54 = 2,021.07 : x
2. Step 2: Convert to fraction form
   2,619.93/3,612.54 = 2,021.07/x
3. Step 3: Cross multiply
   2,619.93x = 3,612.54 × 2,021.07
4. Step 4: Simplify right side
   2,619.93x = 7,301,196.22
5. Step 5: Solve for x
   x = 7,301,196.22/2,619.93
6. Step 6: Final answer
   x = 2,786.79