Finding the Fourth Proportional to 72,940.05, 100,559.78 and 54,713.29

Step by Step Solution

1. Step 1: Write the proportion equation
   72,940.05 : 100,559.78 = 54,713.29 : x
2. Step 2: Convert to fraction form
   72,940.05/100,559.78 = 54,713.29/x
3. Step 3: Cross multiply
   72,940.05x = 100,559.78 × 54,713.29
4. Step 4: Simplify right side
   72,940.05x = 5,501,956,131.91
5. Step 5: Solve for x
   x = 5,501,956,131.91/72,940.05
6. Step 6: Final answer
   x = 75,431.21