Finding the Fourth Proportional to 105,162.84, 145,126.76 and 57,418.07

Step by Step Solution

1. Step 1: Write the proportion equation
   105,162.84 : 145,126.76 = 57,418.07 : x
2. Step 2: Convert to fraction form
   105,162.84/145,126.76 = 57,418.07/x
3. Step 3: Cross multiply
   105,162.84x = 145,126.76 × 57,418.07
4. Step 4: Simplify right side
   105,162.84x = 8,332,897,451.83
5. Step 5: Solve for x
   x = 8,332,897,451.83/105,162.84
6. Step 6: Final answer
   x = 79,238.04