Finding the Fourth Proportional to 71,456.08, 98,611.74 and 39,628

Step by Step Solution

1. Step 1: Write the proportion equation
   71,456.08 : 98,611.74 = 39,628 : x
2. Step 2: Convert to fraction form
   71,456.08/98,611.74 = 39,628/x
3. Step 3: Cross multiply
   71,456.08x = 98,611.74 × 39,628
4. Step 4: Simplify right side
   71,456.08x = 3,907,786,032.72
5. Step 5: Solve for x
   x = 3,907,786,032.72/71,456.08
6. Step 6: Final answer
   x = 54,687.94