Finding the Fourth Proportional to 89,476.36, 123,431.80 and 68,218.72

Step by Step Solution

1. Step 1: Write the proportion equation
   89,476.36 : 123,431.80 = 68,218.72 : x
2. Step 2: Convert to fraction form
   89,476.36/123,431.80 = 68,218.72/x
3. Step 3: Cross multiply
   89,476.36x = 123,431.80 × 68,218.72
4. Step 4: Simplify right side
   89,476.36x = 8,420,359,403.30
5. Step 5: Solve for x
   x = 8,420,359,403.30/89,476.36
6. Step 6: Final answer
   x = 94,107.08