Finding the Fourth Proportional to 89,187.72, 123,162.32 and 57,411.76

Step by Step Solution

1. Step 1: Write the proportion equation
   89,187.72 : 123,162.32 = 57,411.76 : x
2. Step 2: Convert to fraction form
   89,187.72/123,162.32 = 57,411.76/x
3. Step 3: Cross multiply
   89,187.72x = 123,162.32 × 57,411.76
4. Step 4: Simplify right side
   89,187.72x = 7,070,965,556.88
5. Step 5: Solve for x
   x = 7,070,965,556.88/89,187.72
6. Step 6: Final answer
   x = 79,281.83