Finding the Fourth Proportional to 48,131.20, 72,517.78 and 43,456.48

Step by Step Solution

1. Step 1: Write the proportion equation
   48,131.20 : 72,517.78 = 43,456.48 : x
2. Step 2: Convert to fraction form
   48,131.20/72,517.78 = 43,456.48/x
3. Step 3: Cross multiply
   48,131.20x = 72,517.78 × 43,456.48
4. Step 4: Simplify right side
   48,131.20x = 3,151,367,456.21
5. Step 5: Solve for x
   x = 3,151,367,456.21/48,131.20
6. Step 6: Final answer
   x = 65,474.52