Finding the Fourth Proportional to 17,156.61, 25,713.72 and 10,129.50

Step by Step Solution

1. Step 1: Write the proportion equation
   17,156.61 : 25,713.72 = 10,129.50 : x
2. Step 2: Convert to fraction form
   17,156.61/25,713.72 = 10,129.50/x
3. Step 3: Cross multiply
   17,156.61x = 25,713.72 × 10,129.50
4. Step 4: Simplify right side
   17,156.61x = 260,467,126.74
5. Step 5: Solve for x
   x = 260,467,126.74/17,156.61
6. Step 6: Final answer
   x = 15,181.74