Finding the Fourth Proportional to 89,499.23, 123,509.39 and 49,215.59

Step by Step Solution

1. Step 1: Write the proportion equation
   89,499.23 : 123,509.39 = 49,215.59 : x
2. Step 2: Convert to fraction form
   89,499.23/123,509.39 = 49,215.59/x
3. Step 3: Cross multiply
   89,499.23x = 123,509.39 × 49,215.59
4. Step 4: Simplify right side
   89,499.23x = 6,078,587,499.39
5. Step 5: Solve for x
   x = 6,078,587,499.39/89,499.23
6. Step 6: Final answer
   x = 67,917.76