Finding the Fourth Proportional to 78,520.23, 108,356.81 and 42,710.49

Step by Step Solution

1. Step 1: Write the proportion equation
   78,520.23 : 108,356.81 = 42,710.49 : x
2. Step 2: Convert to fraction form
   78,520.23/108,356.81 = 42,710.49/x
3. Step 3: Cross multiply
   78,520.23x = 108,356.81 × 42,710.49
4. Step 4: Simplify right side
   78,520.23x = 4,627,972,236.38
5. Step 5: Solve for x
   x = 4,627,972,236.38/78,520.23
6. Step 6: Final answer
   x = 58,939.87