Finding the Fourth Proportional to 108,555.92, 149,858.48 and 72,769.31

Step by Step Solution

1. Step 1: Write the proportion equation
   108,555.92 : 149,858.48 = 72,769.31 : x
2. Step 2: Convert to fraction form
   108,555.92/149,858.48 = 72,769.31/x
3. Step 3: Cross multiply
   108,555.92x = 149,858.48 × 72,769.31
4. Step 4: Simplify right side
   108,555.92x = 10,905,098,187.25
5. Step 5: Solve for x
   x = 10,905,098,187.25/108,555.92
6. Step 6: Final answer
   x = 100,456.04