Finding the Fourth Proportional to 123,902.63, 170,982.31 and 72,918.37

Step by Step Solution

1. Step 1: Write the proportion equation
   123,902.63 : 170,982.31 = 72,918.37 : x
2. Step 2: Convert to fraction form
   123,902.63/170,982.31 = 72,918.37/x
3. Step 3: Cross multiply
   123,902.63x = 170,982.31 × 72,918.37
4. Step 4: Simplify right side
   123,902.63x = 12,467,751,344.03
5. Step 5: Solve for x
   x = 12,467,751,344.03/123,902.63
6. Step 6: Final answer
   x = 100,625.40