Finding the Fourth Proportional to 63,318, 87,405.72 and 39,456.48

Step by Step Solution

1. Step 1: Write the proportion equation
   63,318 : 87,405.72 = 39,456.48 : x
2. Step 2: Convert to fraction form
   63,318/87,405.72 = 39,456.48/x
3. Step 3: Cross multiply
   63,318x = 87,405.72 × 39,456.48
4. Step 4: Simplify right side
   63,318x = 3,448,722,043.07
5. Step 5: Solve for x
   x = 3,448,722,043.07/63,318
6. Step 6: Final answer
   x = 54,466.69