Finding the Fourth Proportional to 11,729.56, 17,581.55 and 4,327.78

Step by Step Solution

1. Step 1: Write the proportion equation
   11,729.56 : 17,581.55 = 4,327.78 : x
2. Step 2: Convert to fraction form
   11,729.56/17,581.55 = 4,327.78/x
3. Step 3: Cross multiply
   11,729.56x = 17,581.55 × 4,327.78
4. Step 4: Simplify right side
   11,729.56x = 76,089,058.82
5. Step 5: Solve for x
   x = 76,089,058.82/11,729.56
6. Step 6: Final answer
   x = 6,486.95