Finding the Fourth Proportional to 2,142.72, 3,206.79 and 1,657.94

Step by Step Solution

1. Step 1: Write the proportion equation
   2,142.72 : 3,206.79 = 1,657.94 : x
2. Step 2: Convert to fraction form
   2,142.72/3,206.79 = 1,657.94/x
3. Step 3: Cross multiply
   2,142.72x = 3,206.79 × 1,657.94
4. Step 4: Simplify right side
   2,142.72x = 5,316,649.38
5. Step 5: Solve for x
   x = 5,316,649.38/2,142.72
6. Step 6: Final answer
   x = 2,481.26