Finding the Fourth Proportional to 5,422.78, 8,134.56 and 2,651.76

Step by Step Solution

1. Step 1: Write the proportion equation
   5,422.78 : 8,134.56 = 2,651.76 : x
2. Step 2: Convert to fraction form
   5,422.78/8,134.56 = 2,651.76/x
3. Step 3: Cross multiply
   5,422.78x = 8,134.56 × 2,651.76
4. Step 4: Simplify right side
   5,422.78x = 21,570,900.83
5. Step 5: Solve for x
   x = 21,570,900.83/5,422.78
6. Step 6: Final answer
   x = 3,977.83