Finding the Fourth Proportional to 78,456.64, 108,245.28 and 48,665.92

Step by Step Solution

1. Step 1: Write the proportion equation
   78,456.64 : 108,245.28 = 48,665.92 : x
2. Step 2: Convert to fraction form
   78,456.64/108,245.28 = 48,665.92/x
3. Step 3: Cross multiply
   78,456.64x = 108,245.28 × 48,665.92
4. Step 4: Simplify right side
   78,456.64x = 5,267,856,136.86
5. Step 5: Solve for x
   x = 5,267,856,136.86/78,456.64
6. Step 6: Final answer
   x = 67,143.53