Finding the Fourth Proportional to 172,574.55, 258,756.12 and 67,270.50

Step by Step Solution

1. Step 1: Write the proportion equation
   172,574.55 : 258,756.12 = 67,270.50 : x
2. Step 2: Convert to fraction form
   172,574.55/258,756.12 = 67,270.50/x
3. Step 3: Cross multiply
   172,574.55x = 258,756.12 × 67,270.50
4. Step 4: Simplify right side
   172,574.55x = 17,406,653,570.46
5. Step 5: Solve for x
   x = 17,406,653,570.46/172,574.55
6. Step 6: Final answer
   x = 100,864.55