Finding the Fourth Proportional to 72,891.38, 108,937.71 and 53,211.38

Step by Step Solution

1. Step 1: Write the proportion equation
   72,891.38 : 108,937.71 = 53,211.38 : x
2. Step 2: Convert to fraction form
   72,891.38/108,937.71 = 53,211.38/x
3. Step 3: Cross multiply
   72,891.38x = 108,937.71 × 53,211.38
4. Step 4: Simplify right side
   72,891.38x = 5,796,725,617.08
5. Step 5: Solve for x
   x = 5,796,725,617.08/72,891.38
6. Step 6: Final answer
   x = 79,525.53