Finding the Fourth Proportional to 105,999.11, 146,287.75 and 72,082.84

Step by Step Solution

1. Step 1: Write the proportion equation
   105,999.11 : 146,287.75 = 72,082.84 : x
2. Step 2: Convert to fraction form
   105,999.11/146,287.75 = 72,082.84/x
3. Step 3: Cross multiply
   105,999.11x = 146,287.75 × 72,082.84
4. Step 4: Simplify right side
   105,999.11x = 10,544,835,726.56
5. Step 5: Solve for x
   x = 10,544,835,726.56/105,999.11
6. Step 6: Final answer
   x = 99,480.42