Finding the Fourth Proportional to 10,978.82, 16,468.18 and 2,658.84

Step by Step Solution

1. Step 1: Write the proportion equation
   10,978.82 : 16,468.18 = 2,658.84 : x
2. Step 2: Convert to fraction form
   10,978.82/16,468.18 = 2,658.84/x
3. Step 3: Cross multiply
   10,978.82x = 16,468.18 × 2,658.84
4. Step 4: Simplify right side
   10,978.82x = 43,786,213.97
5. Step 5: Solve for x
   x = 43,786,213.97/10,978.82
6. Step 6: Final answer
   x = 3,988.24