Finding the Fourth Proportional to 13,327.86, 19,978.41 and 4,556.78

Step by Step Solution

1. Step 1: Write the proportion equation
   13,327.86 : 19,978.41 = 4,556.78 : x
2. Step 2: Convert to fraction form
   13,327.86/19,978.41 = 4,556.78/x
3. Step 3: Cross multiply
   13,327.86x = 19,978.41 × 4,556.78
4. Step 4: Simplify right side
   13,327.86x = 91,037,119.23
5. Step 5: Solve for x
   x = 91,037,119.23/13,327.86
6. Step 6: Final answer
   x = 6,830.59