Finding the Fourth Proportional to 2,257.86, 3,116.45 and 2,120.18

Step by Step Solution

1. Step 1: Write the proportion equation
   2,257.86 : 3,116.45 = 2,120.18 : x
2. Step 2: Convert to fraction form
   2,257.86/3,116.45 = 2,120.18/x
3. Step 3: Cross multiply
   2,257.86x = 3,116.45 × 2,120.18
4. Step 4: Simplify right side
   2,257.86x = 6,607,434.96
5. Step 5: Solve for x
   x = 6,607,434.96/2,257.86
6. Step 6: Final answer
   x = 2,926.41