Finding the Fourth Proportional to 89,257.42, 123,141.27 and 56,993.23

Step by Step Solution

1. Step 1: Write the proportion equation
   89,257.42 : 123,141.27 = 56,993.23 : x
2. Step 2: Convert to fraction form
   89,257.42/123,141.27 = 56,993.23/x
3. Step 3: Cross multiply
   89,257.42x = 123,141.27 × 56,993.23
4. Step 4: Simplify right side
   89,257.42x = 7,018,218,723.60
5. Step 5: Solve for x
   x = 7,018,218,723.60/89,257.42
6. Step 6: Final answer
   x = 78,628.97