Finding the Fourth Proportional to 2,213.69, 3,320.06 and 653.27

Step by Step Solution

1. Step 1: Write the proportion equation
   2,213.69 : 3,320.06 = 653.27 : x
2. Step 2: Convert to fraction form
   2,213.69/3,320.06 = 653.27/x
3. Step 3: Cross multiply
   2,213.69x = 3,320.06 × 653.27
4. Step 4: Simplify right side
   2,213.69x = 2,168,875.73
5. Step 5: Solve for x
   x = 2,168,875.73/2,213.69
6. Step 6: Final answer
   x = 979.76