Finding the Fourth Proportional to 123,406.61, 170,318.02 and 71,017.49

Step by Step Solution

1. Step 1: Write the proportion equation
   123,406.61 : 170,318.02 = 71,017.49 : x
2. Step 2: Convert to fraction form
   123,406.61/170,318.02 = 71,017.49/x
3. Step 3: Cross multiply
   123,406.61x = 170,318.02 × 71,017.49
4. Step 4: Simplify right side
   123,406.61x = 12,095,558,530.42
5. Step 5: Solve for x
   x = 12,095,558,530.42/123,406.61
6. Step 6: Final answer
   x = 98,013.87