Finding the Fourth Proportional to 72,151.35, 99,568.58 and 40,320.24

Step by Step Solution

1. Step 1: Write the proportion equation
   72,151.35 : 99,568.58 = 40,320.24 : x
2. Step 2: Convert to fraction form
   72,151.35/99,568.58 = 40,320.24/x
3. Step 3: Cross multiply
   72,151.35x = 99,568.58 × 40,320.24
4. Step 4: Simplify right side
   72,151.35x = 4,014,628,840.46
5. Step 5: Solve for x
   x = 4,014,628,840.46/72,151.35
6. Step 6: Final answer
   x = 55,641.77