Finding the Fourth Proportional to 2,141.72, 3,212.66 and 1,047

Step by Step Solution

1. Step 1: Write the proportion equation
   2,141.72 : 3,212.66 = 1,047 : x
2. Step 2: Convert to fraction form
   2,141.72/3,212.66 = 1,047/x
3. Step 3: Cross multiply
   2,141.72x = 3,212.66 × 1,047
4. Step 4: Simplify right side
   2,141.72x = 3,363,657.64
5. Step 5: Solve for x
   x = 3,363,657.64/2,141.72
6. Step 6: Final answer
   x = 1,570.54