Finding the Fourth Proportional to 105,054.80, 144,976.82 and 57,308.94

Step by Step Solution

1. Step 1: Write the proportion equation
   105,054.80 : 144,976.82 = 57,308.94 : x
2. Step 2: Convert to fraction form
   105,054.80/144,976.82 = 57,308.94/x
3. Step 3: Cross multiply
   105,054.80x = 144,976.82 × 57,308.94
4. Step 4: Simplify right side
   105,054.80x = 8,308,467,592.23
5. Step 5: Solve for x
   x = 8,308,467,592.23/105,054.80
6. Step 6: Final answer
   x = 79,086.99