Finding the Fourth Proportional to 123,999.69, 171,115.83 and 73,000.68

Step by Step Solution

1. Step 1: Write the proportion equation
   123,999.69 : 171,115.83 = 73,000.68 : x
2. Step 2: Convert to fraction form
   123,999.69/171,115.83 = 73,000.68/x
3. Step 3: Cross multiply
   123,999.69x = 171,115.83 × 73,000.68
4. Step 4: Simplify right side
   123,999.69x = 12,491,571,948.76
5. Step 5: Solve for x
   x = 12,491,571,948.76/123,999.69
6. Step 6: Final answer
   x = 100,738.74