Finding the Fourth Proportional to 72,989.63, 100,725.82 and 39,455.63

Step by Step Solution

1. Step 1: Write the proportion equation
   72,989.63 : 100,725.82 = 39,455.63 : x
2. Step 2: Convert to fraction form
   72,989.63/100,725.82 = 39,455.63/x
3. Step 3: Cross multiply
   72,989.63x = 100,725.82 × 39,455.63
4. Step 4: Simplify right side
   72,989.63x = 3,974,200,083.10
5. Step 5: Solve for x
   x = 3,974,200,083.10/72,989.63
6. Step 6: Final answer
   x = 54,448.84