Finding the Fourth Proportional to 11,978.20, 17,959.51 and 5,738.05

Step by Step Solution

1. Step 1: Write the proportion equation
   11,978.20 : 17,959.51 = 5,738.05 : x
2. Step 2: Convert to fraction form
   11,978.20/17,959.51 = 5,738.05/x
3. Step 3: Cross multiply
   11,978.20x = 17,959.51 × 5,738.05
4. Step 4: Simplify right side
   11,978.20x = 103,052,566.36
5. Step 5: Solve for x
   x = 103,052,566.36/11,978.20
6. Step 6: Final answer
   x = 8,603.34