Finding the Fourth Proportional to 115,673, 172,537.16 and 105,042.56

Step by Step Solution

1. Step 1: Write the proportion equation
   115,673 : 172,537.16 = 105,042.56 : x
2. Step 2: Convert to fraction form
   115,673/172,537.16 = 105,042.56/x
3. Step 3: Cross multiply
   115,673x = 172,537.16 × 105,042.56
4. Step 4: Simplify right side
   115,673x = 18,123,744,981.53
5. Step 5: Solve for x
   x = 18,123,744,981.53/115,673
6. Step 6: Final answer
   x = 156,680.86