Finding the Fourth Proportional to 123,623.04, 170,601.60 and 72,623.04

Step by Step Solution

1. Step 1: Write the proportion equation
   123,623.04 : 170,601.60 = 72,623.04 : x
2. Step 2: Convert to fraction form
   123,623.04/170,601.60 = 72,623.04/x
3. Step 3: Cross multiply
   123,623.04x = 170,601.60 × 72,623.04
4. Step 4: Simplify right side
   123,623.04x = 12,389,606,820.86
5. Step 5: Solve for x
   x = 12,389,606,820.86/123,623.04
6. Step 6: Final answer
   x = 100,220.86