Finding the Fourth Proportional to 108,939.60, 150,406.32 and 72,692.88

Step by Step Solution

1. Step 1: Write the proportion equation
   108,939.60 : 150,406.32 = 72,692.88 : x
2. Step 2: Convert to fraction form
   108,939.60/150,406.32 = 72,692.88/x
3. Step 3: Cross multiply
   108,939.60x = 150,406.32 × 72,692.88
4. Step 4: Simplify right side
   108,939.60x = 10,933,468,571.00
5. Step 5: Solve for x
   x = 10,933,468,571.00/108,939.60
6. Step 6: Final answer
   x = 100,362.66