Finding the Fourth Proportional to 10,978.98, 16,468.29 and 2,658.94

Step by Step Solution

1. Step 1: Write the proportion equation
   10,978.98 : 16,468.29 = 2,658.94 : x
2. Step 2: Convert to fraction form
   10,978.98/16,468.29 = 2,658.94/x
3. Step 3: Cross multiply
   10,978.98x = 16,468.29 × 2,658.94
4. Step 4: Simplify right side
   10,978.98x = 43,788,195.01
5. Step 5: Solve for x
   x = 43,788,195.01/10,978.98
6. Step 6: Final answer
   x = 3,988.37