Finding the Fourth Proportional to 78,478.43, 108,304.65 and 42,667.67

Step by Step Solution

1. Step 1: Write the proportion equation
   78,478.43 : 108,304.65 = 42,667.67 : x
2. Step 2: Convert to fraction form
   78,478.43/108,304.65 = 42,667.67/x
3. Step 3: Cross multiply
   78,478.43x = 108,304.65 × 42,667.67
4. Step 4: Simplify right side
   78,478.43x = 4,621,107,336.43
5. Step 5: Solve for x
   x = 4,621,107,336.43/78,478.43
6. Step 6: Final answer
   x = 58,883.79