Finding the Fourth Proportional to 2,121.30, 3,181.57 and 951.35

Step by Step Solution

1. Step 1: Write the proportion equation
   2,121.30 : 3,181.57 = 951.35 : x
2. Step 2: Convert to fraction form
   2,121.30/3,181.57 = 951.35/x
3. Step 3: Cross multiply
   2,121.30x = 3,181.57 × 951.35
4. Step 4: Simplify right side
   2,121.30x = 3,026,773.02
5. Step 5: Solve for x
   x = 3,026,773.02/2,121.30
6. Step 6: Final answer
   x = 1,426.85