Finding the Fourth Proportional to 12,856.55, 17,742.12 and 7,482.18

Step by Step Solution

1. Step 1: Write the proportion equation
   12,856.55 : 17,742.12 = 7,482.18 : x
2. Step 2: Convert to fraction form
   12,856.55/17,742.12 = 7,482.18/x
3. Step 3: Cross multiply
   12,856.55x = 17,742.12 × 7,482.18
4. Step 4: Simplify right side
   12,856.55x = 132,749,735.42
5. Step 5: Solve for x
   x = 132,749,735.42/12,856.55
6. Step 6: Final answer
   x = 10,325.46