Finding the Fourth Proportional to 78,105.83, 117,134.51 and 28,179.44

Step by Step Solution

1. Step 1: Write the proportion equation
   78,105.83 : 117,134.51 = 28,179.44 : x
2. Step 2: Convert to fraction form
   78,105.83/117,134.51 = 28,179.44/x
3. Step 3: Cross multiply
   78,105.83x = 117,134.51 × 28,179.44
4. Step 4: Simplify right side
   78,105.83x = 3,300,784,310.80
5. Step 5: Solve for x
   x = 3,300,784,310.80/78,105.83
6. Step 6: Final answer
   x = 42,260.41