Finding the Fourth Proportional to 78,179.30, 107,887.42 and 42,369.30

Step by Step Solution

1. Step 1: Write the proportion equation
   78,179.30 : 107,887.42 = 42,369.30 : x
2. Step 2: Convert to fraction form
   78,179.30/107,887.42 = 42,369.30/x
3. Step 3: Cross multiply
   78,179.30x = 107,887.42 × 42,369.30
4. Step 4: Simplify right side
   78,179.30x = 4,571,114,464.21
5. Step 5: Solve for x
   x = 4,571,114,464.21/78,179.30
6. Step 6: Final answer
   x = 58,469.63