Finding the Fourth Proportional to 5,431.78, 7,495.83 and 2,947.78

Step by Step Solution

1. Step 1: Write the proportion equation
   5,431.78 : 7,495.83 = 2,947.78 : x
2. Step 2: Convert to fraction form
   5,431.78/7,495.83 = 2,947.78/x
3. Step 3: Cross multiply
   5,431.78x = 7,495.83 × 2,947.78
4. Step 4: Simplify right side
   5,431.78x = 22,096,057.76
5. Step 5: Solve for x
   x = 22,096,057.76/5,431.78
6. Step 6: Final answer
   x = 4,067.92