Finding the Fourth Proportional to 121,815.33, 168,104.39 and 68,100.09

Step by Step Solution

1. Step 1: Write the proportion equation
   121,815.33 : 168,104.39 = 68,100.09 : x
2. Step 2: Convert to fraction form
   121,815.33/168,104.39 = 68,100.09/x
3. Step 3: Cross multiply
   121,815.33x = 168,104.39 × 68,100.09
4. Step 4: Simplify right side
   121,815.33x = 11,447,923,747.89
5. Step 5: Solve for x
   x = 11,447,923,747.89/121,815.33
6. Step 6: Final answer
   x = 93,977.69