Finding the Fourth Proportional to 122,995.72, 169,725.54 and 72,685

Step by Step Solution

1. Step 1: Write the proportion equation
   122,995.72 : 169,725.54 = 72,685 : x
2. Step 2: Convert to fraction form
   122,995.72/169,725.54 = 72,685/x
3. Step 3: Cross multiply
   122,995.72x = 169,725.54 × 72,685
4. Step 4: Simplify right side
   122,995.72x = 12,336,500,874.90
5. Step 5: Solve for x
   x = 12,336,500,874.90/122,995.72
6. Step 6: Final answer
   x = 100,300.25