Finding the Fourth Proportional to 102,680.56, 153,806.18 and 82,581.42

Step by Step Solution

1. Step 1: Write the proportion equation
   102,680.56 : 153,806.18 = 82,581.42 : x
2. Step 2: Convert to fraction form
   102,680.56/153,806.18 = 82,581.42/x
3. Step 3: Cross multiply
   102,680.56x = 153,806.18 × 82,581.42
4. Step 4: Simplify right side
   102,680.56x = 12,701,532,749.18
5. Step 5: Solve for x
   x = 12,701,532,749.18/102,680.56
6. Step 6: Final answer
   x = 123,699.49