Finding the Fourth Proportional to 78,165.45, 107,868.42 and 42,355.46

Step by Step Solution

1. Step 1: Write the proportion equation
   78,165.45 : 107,868.42 = 42,355.46 : x
2. Step 2: Convert to fraction form
   78,165.45/107,868.42 = 42,355.46/x
3. Step 3: Cross multiply
   78,165.45x = 107,868.42 × 42,355.46
4. Step 4: Simplify right side
   78,165.45x = 4,568,816,009.23
5. Step 5: Solve for x
   x = 4,568,816,009.23/78,165.45
6. Step 6: Final answer
   x = 58,450.58