Finding the Fourth Proportional to 105,055.02, 144,976.50 and 57,308.58

Step by Step Solution

1. Step 1: Write the proportion equation
   105,055.02 : 144,976.50 = 57,308.58 : x
2. Step 2: Convert to fraction form
   105,055.02/144,976.50 = 57,308.58/x
3. Step 3: Cross multiply
   105,055.02x = 144,976.50 × 57,308.58
4. Step 4: Simplify right side
   105,055.02x = 8,308,397,348.37
5. Step 5: Solve for x
   x = 8,308,397,348.37/105,055.02
6. Step 6: Final answer
   x = 79,086.15