Finding the Fourth Proportional to 104,969.56, 144,909.71 and 72,728.63

Step by Step Solution

1. Step 1: Write the proportion equation
   104,969.56 : 144,909.71 = 72,728.63 : x
2. Step 2: Convert to fraction form
   104,969.56/144,909.71 = 72,728.63/x
3. Step 3: Cross multiply
   104,969.56x = 144,909.71 × 72,728.63
4. Step 4: Simplify right side
   104,969.56x = 10,539,084,682.00
5. Step 5: Solve for x
   x = 10,539,084,682.00/104,969.56
6. Step 6: Final answer
   x = 100,401.34