Finding the Fourth Proportional to 105,055.47, 144,976.55 and 57,309.01

Step by Step Solution

1. Step 1: Write the proportion equation
   105,055.47 : 144,976.55 = 57,309.01 : x
2. Step 2: Convert to fraction form
   105,055.47/144,976.55 = 57,309.01/x
3. Step 3: Cross multiply
   105,055.47x = 144,976.55 × 57,309.01
4. Step 4: Simplify right side
   105,055.47x = 8,308,462,553.72
5. Step 5: Solve for x
   x = 8,308,462,553.72/105,055.47
6. Step 6: Final answer
   x = 79,086.43