Finding the Fourth Proportional to 105,492.82, 145,581.47 and 57,745.15

Step by Step Solution

1. Step 1: Write the proportion equation
   105,492.82 : 145,581.47 = 57,745.15 : x
2. Step 2: Convert to fraction form
   105,492.82/145,581.47 = 57,745.15/x
3. Step 3: Cross multiply
   105,492.82x = 145,581.47 × 57,745.15
4. Step 4: Simplify right side
   105,492.82x = 8,406,623,822.37
5. Step 5: Solve for x
   x = 8,406,623,822.37/105,492.82
6. Step 6: Final answer
   x = 79,689.06