Finding the Fourth Proportional to 2,142.72, 3,212.87 and 1,046.79

Step by Step Solution

1. Step 1: Write the proportion equation
   2,142.72 : 3,212.87 = 1,046.79 : x
2. Step 2: Convert to fraction form
   2,142.72/3,212.87 = 1,046.79/x
3. Step 3: Cross multiply
   2,142.72x = 3,212.87 × 1,046.79
4. Step 4: Simplify right side
   2,142.72x = 3,363,194.95
5. Step 5: Solve for x
   x = 3,363,194.95/2,142.72
6. Step 6: Final answer
   x = 1,569.59