Finding the Fourth Proportional to 123,351.05, 170,171.38 and 72,379.37

Step by Step Solution

1. Step 1: Write the proportion equation
   123,351.05 : 170,171.38 = 72,379.37 : x
2. Step 2: Convert to fraction form
   123,351.05/170,171.38 = 72,379.37/x
3. Step 3: Cross multiply
   123,351.05x = 170,171.38 × 72,379.37
4. Step 4: Simplify right side
   123,351.05x = 12,316,897,792.33
5. Step 5: Solve for x
   x = 12,316,897,792.33/123,351.05
6. Step 6: Final answer
   x = 99,852.39