Finding the Fourth Proportional to 123,678, 170,675.69 and 69,961.86

Step by Step Solution

1. Step 1: Write the proportion equation
   123,678 : 170,675.69 = 69,961.86 : x
2. Step 2: Convert to fraction form
   123,678/170,675.69 = 69,961.86/x
3. Step 3: Cross multiply
   123,678x = 170,675.69 × 69,961.86
4. Step 4: Simplify right side
   123,678x = 11,940,788,379.37
5. Step 5: Solve for x
   x = 11,940,788,379.37/123,678
6. Step 6: Final answer
   x = 96,547.39