Finding the Fourth Proportional to 10,978.56, 16,470.54 and 3,187.44

Step by Step Solution

1. Step 1: Write the proportion equation
   10,978.56 : 16,470.54 = 3,187.44 : x
2. Step 2: Convert to fraction form
   10,978.56/16,470.54 = 3,187.44/x
3. Step 3: Cross multiply
   10,978.56x = 16,470.54 × 3,187.44
4. Step 4: Simplify right side
   10,978.56x = 52,498,858.02
5. Step 5: Solve for x
   x = 52,498,858.02/10,978.56
6. Step 6: Final answer
   x = 4,781.94