Finding the Fourth Proportional to 8,978.91, 13,470.38 and 2,739.48

Step by Step Solution

1. Step 1: Write the proportion equation
   8,978.91 : 13,470.38 = 2,739.48 : x
2. Step 2: Convert to fraction form
   8,978.91/13,470.38 = 2,739.48/x
3. Step 3: Cross multiply
   8,978.91x = 13,470.38 × 2,739.48
4. Step 4: Simplify right side
   8,978.91x = 36,901,836.60
5. Step 5: Solve for x
   x = 36,901,836.60/8,978.91
6. Step 6: Final answer
   x = 4,109.83