Finding the Fourth Proportional to 105,320.37, 145,345.28 and 57,576.27

Step by Step Solution

1. Step 1: Write the proportion equation
   105,320.37 : 145,345.28 = 57,576.27 : x
2. Step 2: Convert to fraction form
   105,320.37/145,345.28 = 57,576.27/x
3. Step 3: Cross multiply
   105,320.37x = 145,345.28 × 57,576.27
4. Step 4: Simplify right side
   105,320.37x = 8,368,438,796.62
5. Step 5: Solve for x
   x = 8,368,438,796.62/105,320.37
6. Step 6: Final answer
   x = 79,456.98