Finding the Fourth Proportional to 2,699.62, 4,046.42 and 1,139.15

Step by Step Solution

1. Step 1: Write the proportion equation
   2,699.62 : 4,046.42 = 1,139.15 : x
2. Step 2: Convert to fraction form
   2,699.62/4,046.42 = 1,139.15/x
3. Step 3: Cross multiply
   2,699.62x = 4,046.42 × 1,139.15
4. Step 4: Simplify right side
   2,699.62x = 4,609,483.76
5. Step 5: Solve for x
   x = 4,609,483.76/2,699.62
6. Step 6: Final answer
   x = 1,707.46