Finding the Fourth Proportional to 78,106, 117,134.78 and 28,179.62

Step by Step Solution

1. Step 1: Write the proportion equation
   78,106 : 117,134.78 = 28,179.62 : x
2. Step 2: Convert to fraction form
   78,106/117,134.78 = 28,179.62/x
3. Step 3: Cross multiply
   78,106x = 117,134.78 × 28,179.62
4. Step 4: Simplify right side
   78,106x = 3,300,813,589.18
5. Step 5: Solve for x
   x = 3,300,813,589.18/78,106
6. Step 6: Final answer
   x = 42,260.69