Finding the Fourth Proportional to 78,106, 117,134.79 and 28,179.61

Step by Step Solution

1. Step 1: Write the proportion equation
   78,106 : 117,134.79 = 28,179.61 : x
2. Step 2: Convert to fraction form
   78,106/117,134.79 = 28,179.61/x
3. Step 3: Cross multiply
   78,106x = 117,134.79 × 28,179.61
4. Step 4: Simplify right side
   78,106x = 3,300,812,699.63
5. Step 5: Solve for x
   x = 3,300,812,699.63/78,106
6. Step 6: Final answer
   x = 42,260.68