Finding the Fourth Proportional to 89,457.08, 123,462.43 and 57,718.31

Step by Step Solution

1. Step 1: Write the proportion equation
   89,457.08 : 123,462.43 = 57,718.31 : x
2. Step 2: Convert to fraction form
   89,457.08/123,462.43 = 57,718.31/x
3. Step 3: Cross multiply
   89,457.08x = 123,462.43 × 57,718.31
4. Step 4: Simplify right side
   89,457.08x = 7,126,042,046.49
5. Step 5: Solve for x
   x = 7,126,042,046.49/89,457.08
6. Step 6: Final answer
   x = 79,658.79