Finding the Fourth Proportional to 105,479.04, 145,561.41 and 57,735.48

Step by Step Solution

1. Step 1: Write the proportion equation
   105,479.04 : 145,561.41 = 57,735.48 : x
2. Step 2: Convert to fraction form
   105,479.04/145,561.41 = 57,735.48/x
3. Step 3: Cross multiply
   105,479.04x = 145,561.41 × 57,735.48
4. Step 4: Simplify right side
   105,479.04x = 8,404,057,875.83
5. Step 5: Solve for x
   x = 8,404,057,875.83/105,479.04
6. Step 6: Final answer
   x = 79,675.15