Finding the Fourth Proportional to 105,496.28, 145,585.27 and 57,754.07

Step by Step Solution

1. Step 1: Write the proportion equation
   105,496.28 : 145,585.27 = 57,754.07 : x
2. Step 2: Convert to fraction form
   105,496.28/145,585.27 = 57,754.07/x
3. Step 3: Cross multiply
   105,496.28x = 145,585.27 × 57,754.07
4. Step 4: Simplify right side
   105,496.28x = 8,408,141,849.35
5. Step 5: Solve for x
   x = 8,408,141,849.35/105,496.28
6. Step 6: Final answer
   x = 79,700.84