Finding the Fourth Proportional to 2,139.16, 3,206.69 and 1,042.93

Step by Step Solution

1. Step 1: Write the proportion equation
   2,139.16 : 3,206.69 = 1,042.93 : x
2. Step 2: Convert to fraction form
   2,139.16/3,206.69 = 1,042.93/x
3. Step 3: Cross multiply
   2,139.16x = 3,206.69 × 1,042.93
4. Step 4: Simplify right side
   2,139.16x = 3,344,337.87
5. Step 5: Solve for x
   x = 3,344,337.87/2,139.16
6. Step 6: Final answer
   x = 1,563.39