Finding the Fourth Proportional to 3,931.69, 5,426.50 and 2,254.22

Step by Step Solution

1. Step 1: Write the proportion equation
   3,931.69 : 5,426.50 = 2,254.22 : x
2. Step 2: Convert to fraction form
   3,931.69/5,426.50 = 2,254.22/x
3. Step 3: Cross multiply
   3,931.69x = 5,426.50 × 2,254.22
4. Step 4: Simplify right side
   3,931.69x = 12,232,524.83
5. Step 5: Solve for x
   x = 12,232,524.83/3,931.69
6. Step 6: Final answer
   x = 3,111.26