Finding the Fourth Proportional to 57,689.82, 79,589.79 and 42,618.56

Step by Step Solution

1. Step 1: Write the proportion equation
   57,689.82 : 79,589.79 = 42,618.56 : x
2. Step 2: Convert to fraction form
   57,689.82/79,589.79 = 42,618.56/x
3. Step 3: Cross multiply
   57,689.82x = 79,589.79 × 42,618.56
4. Step 4: Simplify right side
   57,689.82x = 3,392,001,842.55
5. Step 5: Solve for x
   x = 3,392,001,842.55/57,689.82
6. Step 6: Final answer
   x = 58,797.23