Finding the Fourth Proportional to 17,072.56, 25,612.20 and 7,211.80

Step by Step Solution

1. Step 1: Write the proportion equation
   17,072.56 : 25,612.20 = 7,211.80 : x
2. Step 2: Convert to fraction form
   17,072.56/25,612.20 = 7,211.80/x
3. Step 3: Cross multiply
   17,072.56x = 25,612.20 × 7,211.80
4. Step 4: Simplify right side
   17,072.56x = 184,710,063.96
5. Step 5: Solve for x
   x = 184,710,063.96/17,072.56
6. Step 6: Final answer
   x = 10,819.12