Finding the Fourth Proportional to 105,488.44, 145,568.45 and 57,732.55

Step by Step Solution

1. Step 1: Write the proportion equation
   105,488.44 : 145,568.45 = 57,732.55 : x
2. Step 2: Convert to fraction form
   105,488.44/145,568.45 = 57,732.55/x
3. Step 3: Cross multiply
   105,488.44x = 145,568.45 × 57,732.55
4. Step 4: Simplify right side
   105,488.44x = 8,404,037,598.46
5. Step 5: Solve for x
   x = 8,404,037,598.46/105,488.44
6. Step 6: Final answer
   x = 79,667.86