Finding the Fourth Proportional to 89,198.39, 123,158.35 and 57,422.64

Step by Step Solution

1. Step 1: Write the proportion equation
   89,198.39 : 123,158.35 = 57,422.64 : x
2. Step 2: Convert to fraction form
   89,198.39/123,158.35 = 57,422.64/x
3. Step 3: Cross multiply
   89,198.39x = 123,158.35 × 57,422.64
4. Step 4: Simplify right side
   89,198.39x = 7,072,077,595.04
5. Step 5: Solve for x
   x = 7,072,077,595.04/89,198.39
6. Step 6: Final answer
   x = 79,284.81