Finding the Fourth Proportional to 105,065.13, 144,984.83 and 57,315.63

Step by Step Solution

1. Step 1: Write the proportion equation
   105,065.13 : 144,984.83 = 57,315.63 : x
2. Step 2: Convert to fraction form
   105,065.13/144,984.83 = 57,315.63/x
3. Step 3: Cross multiply
   105,065.13x = 144,984.83 × 57,315.63
4. Step 4: Simplify right side
   105,065.13x = 8,309,896,585.31
5. Step 5: Solve for x
   x = 8,309,896,585.31/105,065.13
6. Step 6: Final answer
   x = 79,092.81