Finding the Fourth Proportional to 2,774.78, 3,830.72 and 2,012.86

Step by Step Solution

1. Step 1: Write the proportion equation
   2,774.78 : 3,830.72 = 2,012.86 : x
2. Step 2: Convert to fraction form
   2,774.78/3,830.72 = 2,012.86/x
3. Step 3: Cross multiply
   2,774.78x = 3,830.72 × 2,012.86
4. Step 4: Simplify right side
   2,774.78x = 7,710,697.33
5. Step 5: Solve for x
   x = 7,710,697.33/2,774.78
6. Step 6: Final answer
   x = 2,778.85