Finding the Fourth Proportional to 78,105.66, 117,134.24 and 28,179.25

Step by Step Solution

1. Step 1: Write the proportion equation
   78,105.66 : 117,134.24 = 28,179.25 : x
2. Step 2: Convert to fraction form
   78,105.66/117,134.24 = 28,179.25/x
3. Step 3: Cross multiply
   78,105.66x = 117,134.24 × 28,179.25
4. Step 4: Simplify right side
   78,105.66x = 3,300,755,032.52
5. Step 5: Solve for x
   x = 3,300,755,032.52/78,105.66
6. Step 6: Final answer
   x = 42,260.13