Finding the Fourth Proportional to 89,406.42, 123,279.87 and 65,164.56

Step by Step Solution

1. Step 1: Write the proportion equation
   89,406.42 : 123,279.87 = 65,164.56 : x
2. Step 2: Convert to fraction form
   89,406.42/123,279.87 = 65,164.56/x
3. Step 3: Cross multiply
   89,406.42x = 123,279.87 × 65,164.56
4. Step 4: Simplify right side
   89,406.42x = 8,033,478,485.41
5. Step 5: Solve for x
   x = 8,033,478,485.41/89,406.42
6. Step 6: Final answer
   x = 89,853.49