Finding the Fourth Proportional to 107,940.52, 161,965.86 and 72,806.50

Step by Step Solution

1. Step 1: Write the proportion equation
   107,940.52 : 161,965.86 = 72,806.50 : x
2. Step 2: Convert to fraction form
   107,940.52/161,965.86 = 72,806.50/x
3. Step 3: Cross multiply
   107,940.52x = 161,965.86 × 72,806.50
4. Step 4: Simplify right side
   107,940.52x = 11,792,167,386.09
5. Step 5: Solve for x
   x = 11,792,167,386.09/107,940.52
6. Step 6: Final answer
   x = 109,246.90