Finding the Fourth Proportional to 89,194.64, 123,171.92 and 57,418.76

Step by Step Solution

1. Step 1: Write the proportion equation
   89,194.64 : 123,171.92 = 57,418.76 : x
2. Step 2: Convert to fraction form
   89,194.64/123,171.92 = 57,418.76/x
3. Step 3: Cross multiply
   89,194.64x = 123,171.92 × 57,418.76
4. Step 4: Simplify right side
   89,194.64x = 7,072,378,913.22
5. Step 5: Solve for x
   x = 7,072,378,913.22/89,194.64
6. Step 6: Final answer
   x = 79,291.52