Finding the Fourth Proportional to 72,893.05, 108,940.20 and 53,213.05

Step by Step Solution

1. Step 1: Write the proportion equation
   72,893.05 : 108,940.20 = 53,213.05 : x
2. Step 2: Convert to fraction form
   72,893.05/108,940.20 = 53,213.05/x
3. Step 3: Cross multiply
   72,893.05x = 108,940.20 × 53,213.05
4. Step 4: Simplify right side
   72,893.05x = 5,797,040,309.61
5. Step 5: Solve for x
   x = 5,797,040,309.61/72,893.05
6. Step 6: Final answer
   x = 79,528.03