Finding the Fourth Proportional to 72,238.10, 99,680.02 and 39,968.44

Step by Step Solution

1. Step 1: Write the proportion equation
   72,238.10 : 99,680.02 = 39,968.44 : x
2. Step 2: Convert to fraction form
   72,238.10/99,680.02 = 39,968.44/x
3. Step 3: Cross multiply
   72,238.10x = 99,680.02 × 39,968.44
4. Step 4: Simplify right side
   72,238.10x = 3,984,054,549.45
5. Step 5: Solve for x
   x = 3,984,054,549.45/72,238.10
6. Step 6: Final answer
   x = 55,151.71