Finding the Fourth Proportional to 78,158.09, 107,857.79 and 42,348.09

Step by Step Solution

1. Step 1: Write the proportion equation
   78,158.09 : 107,857.79 = 42,348.09 : x
2. Step 2: Convert to fraction form
   78,158.09/107,857.79 = 42,348.09/x
3. Step 3: Cross multiply
   78,158.09x = 107,857.79 × 42,348.09
4. Step 4: Simplify right side
   78,158.09x = 4,567,571,398.12
5. Step 5: Solve for x
   x = 4,567,571,398.12/78,158.09
6. Step 6: Final answer
   x = 58,440.16