Finding the Fourth Proportional to 72,159.82, 99,578.72 and 40,328.94

Step by Step Solution

1. Step 1: Write the proportion equation
   72,159.82 : 99,578.72 = 40,328.94 : x
2. Step 2: Convert to fraction form
   72,159.82/99,578.72 = 40,328.94/x
3. Step 3: Cross multiply
   72,159.82x = 99,578.72 × 40,328.94
4. Step 4: Simplify right side
   72,159.82x = 4,015,904,224.16
5. Step 5: Solve for x
   x = 4,015,904,224.16/72,159.82
6. Step 6: Final answer
   x = 55,652.91