Finding the Fourth Proportional to 2,298.90, 3,175.68 and 2,213.55

Step by Step Solution

1. Step 1: Write the proportion equation
   2,298.90 : 3,175.68 = 2,213.55 : x
2. Step 2: Convert to fraction form
   2,298.90/3,175.68 = 2,213.55/x
3. Step 3: Cross multiply
   2,298.90x = 3,175.68 × 2,213.55
4. Step 4: Simplify right side
   2,298.90x = 7,029,543.91
5. Step 5: Solve for x
   x = 7,029,543.91/2,298.90
6. Step 6: Final answer
   x = 3,057.79