Finding the Fourth Proportional to 89,710.56, 123,759 and 57,889.62

Step by Step Solution

1. Step 1: Write the proportion equation
   89,710.56 : 123,759 = 57,889.62 : x
2. Step 2: Convert to fraction form
   89,710.56/123,759 = 57,889.62/x
3. Step 3: Cross multiply
   89,710.56x = 123,759 × 57,889.62
4. Step 4: Simplify right side
   89,710.56x = 7,164,361,481.58
5. Step 5: Solve for x
   x = 7,164,361,481.58/89,710.56
6. Step 6: Final answer
   x = 79,860.85