Finding the Fourth Proportional to 105,116.43, 145,061.79 and 57,370.58

Step by Step Solution

1. Step 1: Write the proportion equation
   105,116.43 : 145,061.79 = 57,370.58 : x
2. Step 2: Convert to fraction form
   105,116.43/145,061.79 = 57,370.58/x
3. Step 3: Cross multiply
   105,116.43x = 145,061.79 × 57,370.58
4. Step 4: Simplify right side
   105,116.43x = 8,322,278,631.67
5. Step 5: Solve for x
   x = 8,322,278,631.67/105,116.43
6. Step 6: Final answer
   x = 79,172.00