Finding the Fourth Proportional to 78,678, 108,576.72 and 45,144

Step by Step Solution

1. Step 1: Write the proportion equation
   78,678 : 108,576.72 = 45,144 : x
2. Step 2: Convert to fraction form
   78,678/108,576.72 = 45,144/x
3. Step 3: Cross multiply
   78,678x = 108,576.72 × 45,144
4. Step 4: Simplify right side
   78,678x = 4,901,587,447.68
5. Step 5: Solve for x
   x = 4,901,587,447.68/78,678
6. Step 6: Final answer
   x = 62,299.34