Finding the Fourth Proportional to 12,856.26, 17,741.76 and 7,551.18

Step by Step Solution

1. Step 1: Write the proportion equation
   12,856.26 : 17,741.76 = 7,551.18 : x
2. Step 2: Convert to fraction form
   12,856.26/17,741.76 = 7,551.18/x
3. Step 3: Cross multiply
   12,856.26x = 17,741.76 × 7,551.18
4. Step 4: Simplify right side
   12,856.26x = 133,971,223.28
5. Step 5: Solve for x
   x = 133,971,223.28/12,856.26
6. Step 6: Final answer
   x = 10,420.70