Finding the Fourth Proportional to 78,789.25, 108,727.32 and 42,979.54

Step by Step Solution

1. Step 1: Write the proportion equation
   78,789.25 : 108,727.32 = 42,979.54 : x
2. Step 2: Convert to fraction form
   78,789.25/108,727.32 = 42,979.54/x
3. Step 3: Cross multiply
   78,789.25x = 108,727.32 × 42,979.54
4. Step 4: Simplify right side
   78,789.25x = 4,673,050,199.03
5. Step 5: Solve for x
   x = 4,673,050,199.03/78,789.25
6. Step 6: Final answer
   x = 59,310.76