Finding the Fourth Proportional to 105,342.72, 145,371.96 and 57,595.56

Step by Step Solution

1. Step 1: Write the proportion equation
   105,342.72 : 145,371.96 = 57,595.56 : x
2. Step 2: Convert to fraction form
   105,342.72/145,371.96 = 57,595.56/x
3. Step 3: Cross multiply
   105,342.72x = 145,371.96 × 57,595.56
4. Step 4: Simplify right side
   105,342.72x = 8,372,779,444.50
5. Step 5: Solve for x
   x = 8,372,779,444.50/105,342.72
6. Step 6: Final answer
   x = 79,481.33