Finding the Fourth Proportional to 3,903.91, 5,387.35 and 2,225.31

Step by Step Solution

1. Step 1: Write the proportion equation
   3,903.91 : 5,387.35 = 2,225.31 : x
2. Step 2: Convert to fraction form
   3,903.91/5,387.35 = 2,225.31/x
3. Step 3: Cross multiply
   3,903.91x = 5,387.35 × 2,225.31
4. Step 4: Simplify right side
   3,903.91x = 11,988,521.83
5. Step 5: Solve for x
   x = 11,988,521.83/3,903.91
6. Step 6: Final answer
   x = 3,070.90