Finding the Fourth Proportional to 11,978.05, 17,959.35 and 5,737.91

Step by Step Solution

1. Step 1: Write the proportion equation
   11,978.05 : 17,959.35 = 5,737.91 : x
2. Step 2: Convert to fraction form
   11,978.05/17,959.35 = 5,737.91/x
3. Step 3: Cross multiply
   11,978.05x = 17,959.35 × 5,737.91
4. Step 4: Simplify right side
   11,978.05x = 103,049,133.96
5. Step 5: Solve for x
   x = 103,049,133.96/11,978.05
6. Step 6: Final answer
   x = 8,603.16