Finding the Fourth Proportional to 105,096.72, 145,036.56 and 57,353.15

Step by Step Solution

1. Step 1: Write the proportion equation
   105,096.72 : 145,036.56 = 57,353.15 : x
2. Step 2: Convert to fraction form
   105,096.72/145,036.56 = 57,353.15/x
3. Step 3: Cross multiply
   105,096.72x = 145,036.56 × 57,353.15
4. Step 4: Simplify right side
   105,096.72x = 8,318,304,158.83
5. Step 5: Solve for x
   x = 8,318,304,158.83/105,096.72
6. Step 6: Final answer
   x = 79,149.03