Finding the Fourth Proportional to 123,220.27, 170,061.00 and 72,245.55

Step by Step Solution

1. Step 1: Write the proportion equation
   123,220.27 : 170,061.00 = 72,245.55 : x
2. Step 2: Convert to fraction form
   123,220.27/170,061.00 = 72,245.55/x
3. Step 3: Cross multiply
   123,220.27x = 170,061.00 × 72,245.55
4. Step 4: Simplify right side
   123,220.27x = 12,286,150,845.36
5. Step 5: Solve for x
   x = 12,286,150,845.36/123,220.27
6. Step 6: Final answer
   x = 99,708.84