Finding the Fourth Proportional to 171,401.11, 257,005.49 and 117,426.78

Step by Step Solution

1. Step 1: Write the proportion equation
   171,401.11 : 257,005.49 = 117,426.78 : x
2. Step 2: Convert to fraction form
   171,401.11/257,005.49 = 117,426.78/x
3. Step 3: Cross multiply
   171,401.11x = 257,005.49 × 117,426.78
4. Step 4: Simplify right side
   171,401.11x = 30,179,327,133.02
5. Step 5: Solve for x
   x = 30,179,327,133.02/171,401.11
6. Step 6: Final answer
   x = 176,074.28