Finding the Fourth Proportional to 78,789.94, 108,730.73 and 42,979.18

Step by Step Solution

1. Step 1: Write the proportion equation
   78,789.94 : 108,730.73 = 42,979.18 : x
2. Step 2: Convert to fraction form
   78,789.94/108,730.73 = 42,979.18/x
3. Step 3: Cross multiply
   78,789.94x = 108,730.73 × 42,979.18
4. Step 4: Simplify right side
   78,789.94x = 4,673,157,840.62
5. Step 5: Solve for x
   x = 4,673,157,840.62/78,789.94
6. Step 6: Final answer
   x = 59,311.61