Finding the Fourth Proportional to 72,153.48, 99,571.50 and 40,322.37

Step by Step Solution

1. Step 1: Write the proportion equation
   72,153.48 : 99,571.50 = 40,322.37 : x
2. Step 2: Convert to fraction form
   72,153.48/99,571.50 = 40,322.37/x
3. Step 3: Cross multiply
   72,153.48x = 99,571.50 × 40,322.37
4. Step 4: Simplify right side
   72,153.48x = 4,014,958,864.46
5. Step 5: Solve for x
   x = 4,014,958,864.46/72,153.48
6. Step 6: Final answer
   x = 55,644.70