Finding the Fourth Proportional to 2,139.50, 3,206.14 and 1,042.63

Step by Step Solution

1. Step 1: Write the proportion equation
   2,139.50 : 3,206.14 = 1,042.63 : x
2. Step 2: Convert to fraction form
   2,139.50/3,206.14 = 1,042.63/x
3. Step 3: Cross multiply
   2,139.50x = 3,206.14 × 1,042.63
4. Step 4: Simplify right side
   2,139.50x = 3,342,807.13
5. Step 5: Solve for x
   x = 3,342,807.13/2,139.50
6. Step 6: Final answer
   x = 1,562.42