Finding the Fourth Proportional to 10,978.49, 16,468.19 and 3,187.30

Step by Step Solution

1. Step 1: Write the proportion equation
   10,978.49 : 16,468.19 = 3,187.30 : x
2. Step 2: Convert to fraction form
   10,978.49/16,468.19 = 3,187.30/x
3. Step 3: Cross multiply
   10,978.49x = 16,468.19 × 3,187.30
4. Step 4: Simplify right side
   10,978.49x = 52,489,074.60
5. Step 5: Solve for x
   x = 52,489,074.60/10,978.49
6. Step 6: Final answer
   x = 4,781.08