Finding the Fourth Proportional to 17,178.72, 25,761.60 and 7,311.84

Step by Step Solution

1. Step 1: Write the proportion equation
   17,178.72 : 25,761.60 = 7,311.84 : x
2. Step 2: Convert to fraction form
   17,178.72/25,761.60 = 7,311.84/x
3. Step 3: Cross multiply
   17,178.72x = 25,761.60 × 7,311.84
4. Step 4: Simplify right side
   17,178.72x = 188,364,697.34
5. Step 5: Solve for x
   x = 188,364,697.34/17,178.72
6. Step 6: Final answer
   x = 10,965.00