Finding the Fourth Proportional to 105,659.73, 145,814.04 and 57,913.07

Step by Step Solution

1. Step 1: Write the proportion equation
   105,659.73 : 145,814.04 = 57,913.07 : x
2. Step 2: Convert to fraction form
   105,659.73/145,814.04 = 57,913.07/x
3. Step 3: Cross multiply
   105,659.73x = 145,814.04 × 57,913.07
4. Step 4: Simplify right side
   105,659.73x = 8,444,537,976.43
5. Step 5: Solve for x
   x = 8,444,537,976.43/105,659.73
6. Step 6: Final answer
   x = 79,922.01