Finding the Fourth Proportional to 161,636.72, 242,513.52 and 82,788.08

Step by Step Solution

1. Step 1: Write the proportion equation
   161,636.72 : 242,513.52 = 82,788.08 : x
2. Step 2: Convert to fraction form
   161,636.72/242,513.52 = 82,788.08/x
3. Step 3: Cross multiply
   161,636.72x = 242,513.52 × 82,788.08
4. Step 4: Simplify right side
   161,636.72x = 20,077,228,694.84
5. Step 5: Solve for x
   x = 20,077,228,694.84/161,636.72
6. Step 6: Final answer
   x = 124,212.05