Finding the Fourth Proportional to 2,213.68, 3,320.56 and 914.32

Step by Step Solution

1. Step 1: Write the proportion equation
   2,213.68 : 3,320.56 = 914.32 : x
2. Step 2: Convert to fraction form
   2,213.68/3,320.56 = 914.32/x
3. Step 3: Cross multiply
   2,213.68x = 3,320.56 × 914.32
4. Step 4: Simplify right side
   2,213.68x = 3,036,054.42
5. Step 5: Solve for x
   x = 3,036,054.42/2,213.68
6. Step 6: Final answer
   x = 1,371.50