Finding the Fourth Proportional to 72,890.88, 108,936.96 and 53,210.88

Step by Step Solution

1. Step 1: Write the proportion equation
   72,890.88 : 108,936.96 = 53,210.88 : x
2. Step 2: Convert to fraction form
   72,890.88/108,936.96 = 53,210.88/x
3. Step 3: Cross multiply
   72,890.88x = 108,936.96 × 53,210.88
4. Step 4: Simplify right side
   72,890.88x = 5,796,631,506.12
5. Step 5: Solve for x
   x = 5,796,631,506.12/72,890.88
6. Step 6: Final answer
   x = 79,524.78