Finding the Fourth Proportional to 2,142.57, 3,212.37 and 1,047.81

Step by Step Solution

1. Step 1: Write the proportion equation
   2,142.57 : 3,212.37 = 1,047.81 : x
2. Step 2: Convert to fraction form
   2,142.57/3,212.37 = 1,047.81/x
3. Step 3: Cross multiply
   2,142.57x = 3,212.37 × 1,047.81
4. Step 4: Simplify right side
   2,142.57x = 3,365,953.41
5. Step 5: Solve for x
   x = 3,365,953.41/2,142.57
6. Step 6: Final answer
   x = 1,570.99