Finding the Fourth Proportional to 78,105, 117,158.94 and 28,188.84

Step by Step Solution

1. Step 1: Write the proportion equation
   78,105 : 117,158.94 = 28,188.84 : x
2. Step 2: Convert to fraction form
   78,105/117,158.94 = 28,188.84/x
3. Step 3: Cross multiply
   78,105x = 117,158.94 × 28,188.84
4. Step 4: Simplify right side
   78,105x = 3,302,574,614.23
5. Step 5: Solve for x
   x = 3,302,574,614.23/78,105
6. Step 6: Final answer
   x = 42,283.78