Finding the Fourth Proportional to 171,617.30, 257,474.55 and 53,300.60

Step by Step Solution

1. Step 1: Write the proportion equation
   171,617.30 : 257,474.55 = 53,300.60 : x
2. Step 2: Convert to fraction form
   171,617.30/257,474.55 = 53,300.60/x
3. Step 3: Cross multiply
   171,617.30x = 257,474.55 × 53,300.60
4. Step 4: Simplify right side
   171,617.30x = 13,723,547,999.73
5. Step 5: Solve for x
   x = 13,723,547,999.73/171,617.30
6. Step 6: Final answer
   x = 79,965.99