Finding the Fourth Proportional to 10,155.54, 14,014.31 and 5,679.78

Step by Step Solution

1. Step 1: Write the proportion equation
   10,155.54 : 14,014.31 = 5,679.78 : x
2. Step 2: Convert to fraction form
   10,155.54/14,014.31 = 5,679.78/x
3. Step 3: Cross multiply
   10,155.54x = 14,014.31 × 5,679.78
4. Step 4: Simplify right side
   10,155.54x = 79,598,169.25
5. Step 5: Solve for x
   x = 79,598,169.25/10,155.54
6. Step 6: Final answer
   x = 7,837.91