Finding the Fourth Proportional to 2,776.42, 3,830.56 and 1,979.85

Step by Step Solution

1. Step 1: Write the proportion equation
   2,776.42 : 3,830.56 = 1,979.85 : x
2. Step 2: Convert to fraction form
   2,776.42/3,830.56 = 1,979.85/x
3. Step 3: Cross multiply
   2,776.42x = 3,830.56 × 1,979.85
4. Step 4: Simplify right side
   2,776.42x = 7,583,943.63
5. Step 5: Solve for x
   x = 7,583,943.63/2,776.42
6. Step 6: Final answer
   x = 2,731.55