Finding the Fourth Proportional to 89,459.58, 123,465.88 and 57,720.81

Step by Step Solution

1. Step 1: Write the proportion equation
   89,459.58 : 123,465.88 = 57,720.81 : x
2. Step 2: Convert to fraction form
   89,459.58/123,465.88 = 57,720.81/x
3. Step 3: Cross multiply
   89,459.58x = 123,465.88 × 57,720.81
4. Step 4: Simplify right side
   89,459.58x = 7,126,550,600.96
5. Step 5: Solve for x
   x = 7,126,550,600.96/89,459.58
6. Step 6: Final answer
   x = 79,662.24