Finding the Fourth Proportional to 105,837.34, 158,672.79 and 72,456.23

Step by Step Solution

1. Step 1: Write the proportion equation
   105,837.34 : 158,672.79 = 72,456.23 : x
2. Step 2: Convert to fraction form
   105,837.34/158,672.79 = 72,456.23/x
3. Step 3: Cross multiply
   105,837.34x = 158,672.79 × 72,456.23
4. Step 4: Simplify right side
   105,837.34x = 11,496,832,166.98
5. Step 5: Solve for x
   x = 11,496,832,166.98/105,837.34
6. Step 6: Final answer
   x = 108,627.37