Finding the Fourth Proportional to 105,945.44, 146,298.42 and 72,079.74

Step by Step Solution

1. Step 1: Write the proportion equation
   105,945.44 : 146,298.42 = 72,079.74 : x
2. Step 2: Convert to fraction form
   105,945.44/146,298.42 = 72,079.74/x
3. Step 3: Cross multiply
   105,945.44x = 146,298.42 × 72,079.74
4. Step 4: Simplify right side
   105,945.44x = 10,545,152,076.01
5. Step 5: Solve for x
   x = 10,545,152,076.01/105,945.44
6. Step 6: Final answer
   x = 99,533.80