Finding the Fourth Proportional to 12,856.41, 17,741.70 and 7,551.72

Step by Step Solution

1. Step 1: Write the proportion equation
   12,856.41 : 17,741.70 = 7,551.72 : x
2. Step 2: Convert to fraction form
   12,856.41/17,741.70 = 7,551.72/x
3. Step 3: Cross multiply
   12,856.41x = 17,741.70 × 7,551.72
4. Step 4: Simplify right side
   12,856.41x = 133,980,350.72
5. Step 5: Solve for x
   x = 133,980,350.72/12,856.41
6. Step 6: Final answer
   x = 10,421.29