Finding the Fourth Proportional to 105,097.72, 145,037.94 and 57,354.15

Step by Step Solution

1. Step 1: Write the proportion equation
   105,097.72 : 145,037.94 = 57,354.15 : x
2. Step 2: Convert to fraction form
   105,097.72/145,037.94 = 57,354.15/x
3. Step 3: Cross multiply
   105,097.72x = 145,037.94 × 57,354.15
4. Step 4: Simplify right side
   105,097.72x = 8,318,527,766.45
5. Step 5: Solve for x
   x = 8,318,527,766.45/105,097.72
6. Step 6: Final answer
   x = 79,150.41