Finding the Fourth Proportional to 89,676, 123,786.72 and 70,505.76

Step by Step Solution

1. Step 1: Write the proportion equation
   89,676 : 123,786.72 = 70,505.76 : x
2. Step 2: Convert to fraction form
   89,676/123,786.72 = 70,505.76/x
3. Step 3: Cross multiply
   89,676x = 123,786.72 × 70,505.76
4. Step 4: Simplify right side
   89,676x = 8,727,676,771.51
5. Step 5: Solve for x
   x = 8,727,676,771.51/89,676
6. Step 6: Final answer
   x = 97,324.55