Finding the Fourth Proportional to 89,680.67, 123,759.68 and 53,871.29

Step by Step Solution

1. Step 1: Write the proportion equation
   89,680.67 : 123,759.68 = 53,871.29 : x
2. Step 2: Convert to fraction form
   89,680.67/123,759.68 = 53,871.29/x
3. Step 3: Cross multiply
   89,680.67x = 123,759.68 × 53,871.29
4. Step 4: Simplify right side
   89,680.67x = 6,667,092,723.43
5. Step 5: Solve for x
   x = 6,667,092,723.43/89,680.67
6. Step 6: Final answer
   x = 74,342.59