Finding the Fourth Proportional to 72,112.34, 108,166.62 and 32,640.68

Step by Step Solution

1. Step 1: Write the proportion equation
   72,112.34 : 108,166.62 = 32,640.68 : x
2. Step 2: Convert to fraction form
   72,112.34/108,166.62 = 32,640.68/x
3. Step 3: Cross multiply
   72,112.34x = 108,166.62 × 32,640.68
4. Step 4: Simplify right side
   72,112.34x = 3,530,632,030.10
5. Step 5: Solve for x
   x = 3,530,632,030.10/72,112.34
6. Step 6: Final answer
   x = 48,960.16