Finding the Fourth Proportional to 172,117.53, 258,277.34 and 72,270.04

Step by Step Solution

1. Step 1: Write the proportion equation
   172,117.53 : 258,277.34 = 72,270.04 : x
2. Step 2: Convert to fraction form
   172,117.53/258,277.34 = 72,270.04/x
3. Step 3: Cross multiply
   172,117.53x = 258,277.34 × 72,270.04
4. Step 4: Simplify right side
   172,117.53x = 18,665,713,692.89
5. Step 5: Solve for x
   x = 18,665,713,692.89/172,117.53
6. Step 6: Final answer
   x = 108,447.49