Finding the Fourth Proportional to 78,273.42, 117,306.30 and 42,643.34

Step by Step Solution

1. Step 1: Write the proportion equation
   78,273.42 : 117,306.30 = 42,643.34 : x
2. Step 2: Convert to fraction form
   78,273.42/117,306.30 = 42,643.34/x
3. Step 3: Cross multiply
   78,273.42x = 117,306.30 × 42,643.34
4. Step 4: Simplify right side
   78,273.42x = 5,002,332,435.04
5. Step 5: Solve for x
   x = 5,002,332,435.04/78,273.42
6. Step 6: Final answer
   x = 63,908.44