Finding the Fourth Proportional to 2,072.21, 2,859.77 and 1,373.09

Step by Step Solution

1. Step 1: Write the proportion equation
   2,072.21 : 2,859.77 = 1,373.09 : x
2. Step 2: Convert to fraction form
   2,072.21/2,859.77 = 1,373.09/x
3. Step 3: Cross multiply
   2,072.21x = 2,859.77 × 1,373.09
4. Step 4: Simplify right side
   2,072.21x = 3,926,714.72
5. Step 5: Solve for x
   x = 3,926,714.72/2,072.21
6. Step 6: Final answer
   x = 1,894.94