Finding the Fourth Proportional to 2,780.26, 3,835.86 and 1,983.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,780.26 : 3,835.86 = 1,983.72 : x
2. Step 2: Convert to fraction form
   2,780.26/3,835.86 = 1,983.72/x
3. Step 3: Cross multiply
   2,780.26x = 3,835.86 × 1,983.72
4. Step 4: Simplify right side
   2,780.26x = 7,609,272.20
5. Step 5: Solve for x
   x = 7,609,272.20/2,780.26
6. Step 6: Final answer
   x = 2,736.89