Finding the Fourth Proportional to 2,156.40, 3,234.72 and 675.84

Step by Step Solution

1. Step 1: Write the proportion equation
   2,156.40 : 3,234.72 = 675.84 : x
2. Step 2: Convert to fraction form
   2,156.40/3,234.72 = 675.84/x
3. Step 3: Cross multiply
   2,156.40x = 3,234.72 × 675.84
4. Step 4: Simplify right side
   2,156.40x = 2,186,153.16
5. Step 5: Solve for x
   x = 2,186,153.16/2,156.40
6. Step 6: Final answer
   x = 1,013.80