Finding the Fourth Proportional to 2,856.43, 4,282.51 and 1,211.93

Step by Step Solution

1. Step 1: Write the proportion equation
   2,856.43 : 4,282.51 = 1,211.93 : x
2. Step 2: Convert to fraction form
   2,856.43/4,282.51 = 1,211.93/x
3. Step 3: Cross multiply
   2,856.43x = 4,282.51 × 1,211.93
4. Step 4: Simplify right side
   2,856.43x = 5,190,102.34
5. Step 5: Solve for x
   x = 5,190,102.34/2,856.43
6. Step 6: Final answer
   x = 1,816.99