Finding the Fourth Proportional to 163,300.10, 225,336.72 and 91,688

Step by Step Solution

1. Step 1: Write the proportion equation
   163,300.10 : 225,336.72 = 91,688 : x
2. Step 2: Convert to fraction form
   163,300.10/225,336.72 = 91,688/x
3. Step 3: Cross multiply
   163,300.10x = 225,336.72 × 91,688
4. Step 4: Simplify right side
   163,300.10x = 20,660,673,183.36
5. Step 5: Solve for x
   x = 20,660,673,183.36/163,300.10
6. Step 6: Final answer
   x = 126,519.66