Finding the Fourth Proportional to 78,165.15, 107,868.29 and 42,355.23

Step by Step Solution

1. Step 1: Write the proportion equation
   78,165.15 : 107,868.29 = 42,355.23 : x
2. Step 2: Convert to fraction form
   78,165.15/107,868.29 = 42,355.23/x
3. Step 3: Cross multiply
   78,165.15x = 107,868.29 × 42,355.23
4. Step 4: Simplify right side
   78,165.15x = 4,568,786,126.77
5. Step 5: Solve for x
   x = 4,568,786,126.77/78,165.15
6. Step 6: Final answer
   x = 58,450.42