Finding the Fourth Proportional to 72,417.09, 99,940.34 and 40,153.16

Step by Step Solution

1. Step 1: Write the proportion equation
   72,417.09 : 99,940.34 = 40,153.16 : x
2. Step 2: Convert to fraction form
   72,417.09/99,940.34 = 40,153.16/x
3. Step 3: Cross multiply
   72,417.09x = 99,940.34 × 40,153.16
4. Step 4: Simplify right side
   72,417.09x = 4,012,919,762.01
5. Step 5: Solve for x
   x = 4,012,919,762.01/72,417.09
6. Step 6: Final answer
   x = 55,413.99