Finding the Fourth Proportional to 163,172.46, 225,200.42 and 91,556.72

Step by Step Solution

1. Step 1: Write the proportion equation
   163,172.46 : 225,200.42 = 91,556.72 : x
2. Step 2: Convert to fraction form
   163,172.46/225,200.42 = 91,556.72/x
3. Step 3: Cross multiply
   163,172.46x = 225,200.42 × 91,556.72
4. Step 4: Simplify right side
   163,172.46x = 20,618,611,797.82
5. Step 5: Solve for x
   x = 20,618,611,797.82/163,172.46
6. Step 6: Final answer
   x = 126,360.86