Finding the Fourth Proportional to 3,393.30, 5,086.70 and 2,156.88

Step by Step Solution

1. Step 1: Write the proportion equation
   3,393.30 : 5,086.70 = 2,156.88 : x
2. Step 2: Convert to fraction form
   3,393.30/5,086.70 = 2,156.88/x
3. Step 3: Cross multiply
   3,393.30x = 5,086.70 × 2,156.88
4. Step 4: Simplify right side
   3,393.30x = 10,971,401.50
5. Step 5: Solve for x
   x = 10,971,401.50/3,393.30
6. Step 6: Final answer
   x = 3,233.25