Finding the Fourth Proportional to 123,840.63, 170,952.39 and 83,608.89

Step by Step Solution

1. Step 1: Write the proportion equation
   123,840.63 : 170,952.39 = 83,608.89 : x
2. Step 2: Convert to fraction form
   123,840.63/170,952.39 = 83,608.89/x
3. Step 3: Cross multiply
   123,840.63x = 170,952.39 × 83,608.89
4. Step 4: Simplify right side
   123,840.63x = 14,293,139,570.75
5. Step 5: Solve for x
   x = 14,293,139,570.75/123,840.63
6. Step 6: Final answer
   x = 115,415.59