Finding the Fourth Proportional to 78,078.66, 107,748.59 and 42,268.67

Step by Step Solution

1. Step 1: Write the proportion equation
   78,078.66 : 107,748.59 = 42,268.67 : x
2. Step 2: Convert to fraction form
   78,078.66/107,748.59 = 42,268.67/x
3. Step 3: Cross multiply
   78,078.66x = 107,748.59 × 42,268.67
4. Step 4: Simplify right side
   78,078.66x = 4,554,389,593.68
5. Step 5: Solve for x
   x = 4,554,389,593.68/78,078.66
6. Step 6: Final answer
   x = 58,330.79