Finding the Fourth Proportional to 105,429.70, 145,492.89 and 57,683.24

Step by Step Solution

1. Step 1: Write the proportion equation
   105,429.70 : 145,492.89 = 57,683.24 : x
2. Step 2: Convert to fraction form
   105,429.70/145,492.89 = 57,683.24/x
3. Step 3: Cross multiply
   105,429.70x = 145,492.89 × 57,683.24
4. Step 4: Simplify right side
   105,429.70x = 8,392,500,564.70
5. Step 5: Solve for x
   x = 8,392,500,564.70/105,429.70
6. Step 6: Final answer
   x = 79,602.82