Finding the Fourth Proportional to 17,156.20, 25,731.18 and 5,145.88

Step by Step Solution

1. Step 1: Write the proportion equation
   17,156.20 : 25,731.18 = 5,145.88 : x
2. Step 2: Convert to fraction form
   17,156.20/25,731.18 = 5,145.88/x
3. Step 3: Cross multiply
   17,156.20x = 25,731.18 × 5,145.88
4. Step 4: Simplify right side
   17,156.20x = 132,409,564.54
5. Step 5: Solve for x
   x = 132,409,564.54/17,156.20
6. Step 6: Final answer
   x = 7,717.88