Finding the Fourth Proportional to 2,213.45, 3,321.68 and 914.91

Step by Step Solution

1. Step 1: Write the proportion equation
   2,213.45 : 3,321.68 = 914.91 : x
2. Step 2: Convert to fraction form
   2,213.45/3,321.68 = 914.91/x
3. Step 3: Cross multiply
   2,213.45x = 3,321.68 × 914.91
4. Step 4: Simplify right side
   2,213.45x = 3,039,038.25
5. Step 5: Solve for x
   x = 3,039,038.25/2,213.45
6. Step 6: Final answer
   x = 1,372.99