Finding the Fourth Proportional to 89,834.42, 123,909.32 and 72,839.37

Step by Step Solution

1. Step 1: Write the proportion equation
   89,834.42 : 123,909.32 = 72,839.37 : x
2. Step 2: Convert to fraction form
   89,834.42/123,909.32 = 72,839.37/x
3. Step 3: Cross multiply
   89,834.42x = 123,909.32 × 72,839.37
4. Step 4: Simplify right side
   89,834.42x = 9,025,476,805.93
5. Step 5: Solve for x
   x = 9,025,476,805.93/89,834.42
6. Step 6: Final answer
   x = 100,467.91