Finding the Fourth Proportional to 123,729.09, 170,746.61 and 67,140.47

Step by Step Solution

1. Step 1: Write the proportion equation
   123,729.09 : 170,746.61 = 67,140.47 : x
2. Step 2: Convert to fraction form
   123,729.09/170,746.61 = 67,140.47/x
3. Step 3: Cross multiply
   123,729.09x = 170,746.61 × 67,140.47
4. Step 4: Simplify right side
   123,729.09x = 11,464,006,456.87
5. Step 5: Solve for x
   x = 11,464,006,456.87/123,729.09
6. Step 6: Final answer
   x = 92,654.09