Finding the Fourth Proportional to 11,920.36, 17,851.76 and 5,978.56

Step by Step Solution

1. Step 1: Write the proportion equation
   11,920.36 : 17,851.76 = 5,978.56 : x
2. Step 2: Convert to fraction form
   11,920.36/17,851.76 = 5,978.56/x
3. Step 3: Cross multiply
   11,920.36x = 17,851.76 × 5,978.56
4. Step 4: Simplify right side
   11,920.36x = 106,727,818.27
5. Step 5: Solve for x
   x = 106,727,818.27/11,920.36
6. Step 6: Final answer
   x = 8,953.41