Finding the Fourth Proportional to 89,794.28, 123,996.20 and 85,540.56

Step by Step Solution

1. Step 1: Write the proportion equation
   89,794.28 : 123,996.20 = 85,540.56 : x
2. Step 2: Convert to fraction form
   89,794.28/123,996.20 = 85,540.56/x
3. Step 3: Cross multiply
   89,794.28x = 123,996.20 × 85,540.56
4. Step 4: Simplify right side
   89,794.28x = 10,606,704,909.71
5. Step 5: Solve for x
   x = 10,606,704,909.71/89,794.28
6. Step 6: Final answer
   x = 118,122.28