Finding the Fourth Proportional to 11,818.11, 17,738.16 and 5,978.82

Step by Step Solution

1. Step 1: Write the proportion equation
   11,818.11 : 17,738.16 = 5,978.82 : x
2. Step 2: Convert to fraction form
   11,818.11/17,738.16 = 5,978.82/x
3. Step 3: Cross multiply
   11,818.11x = 17,738.16 × 5,978.82
4. Step 4: Simplify right side
   11,818.11x = 106,053,265.77
5. Step 5: Solve for x
   x = 106,053,265.77/11,818.11
6. Step 6: Final answer
   x = 8,973.79