Finding the Fourth Proportional to 1,298.56, 1,947.78 and 324.67

Step by Step Solution

1. Step 1: Write the proportion equation
   1,298.56 : 1,947.78 = 324.67 : x
2. Step 2: Convert to fraction form
   1,298.56/1,947.78 = 324.67/x
3. Step 3: Cross multiply
   1,298.56x = 1,947.78 × 324.67
4. Step 4: Simplify right side
   1,298.56x = 632,385.73
5. Step 5: Solve for x
   x = 632,385.73/1,298.56
6. Step 6: Final answer
   x = 486.99