Finding the Fourth Proportional to 54,316.72, 74,929.62 and 40,144.96

Step by Step Solution

1. Step 1: Write the proportion equation
   54,316.72 : 74,929.62 = 40,144.96 : x
2. Step 2: Convert to fraction form
   54,316.72/74,929.62 = 40,144.96/x
3. Step 3: Cross multiply
   54,316.72x = 74,929.62 × 40,144.96
4. Step 4: Simplify right side
   54,316.72x = 3,008,046,597.72
5. Step 5: Solve for x
   x = 3,008,046,597.72/54,316.72
6. Step 6: Final answer
   x = 55,379.75